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ReflectionGraphicsStateOperationFactory.cs
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ReflectionGraphicsStateOperationFactory.cs
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using UglyToad.PdfPig.Tokenization;
namespace UglyToad.PdfPig.Graphics
{
using Operations;
using Operations.ClippingPaths;
using Operations.Compatibility;
using Operations.General;
using Operations.InlineImages;
using Operations.MarkedContent;
using Operations.PathConstruction;
using Operations.SpecialGraphicsState;
using Operations.TextObjects;
using Operations.TextPositioning;
using Operations.TextShowing;
using Operations.TextState;
using PdfPig.Core;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using Tokens;
using Operations.PathPainting;
internal class ReflectionGraphicsStateOperationFactory : IGraphicsStateOperationFactory
{
private static readonly ListPool<double> DoubleListPool = new ListPool<double>(10);
private readonly IReadOnlyDictionary<string, Type> operations = new Dictionary<string, Type>()
{
{ SetFlatnessTolerance.Symbol, typeof(SetFlatnessTolerance) },
{ ModifyClippingByEvenOddIntersect.Symbol, typeof(ModifyClippingByEvenOddIntersect) },
{ ModifyClippingByNonZeroWindingIntersect.Symbol, typeof(ModifyClippingByNonZeroWindingIntersect) },
{ BeginCompatibilitySection.Symbol, typeof(BeginCompatibilitySection) },
{ EndCompatibilitySection.Symbol, typeof(EndCompatibilitySection) },
{ SetColorRenderingIntent.Symbol, typeof(SetColorRenderingIntent) },
{ SetLineCap.Symbol, typeof(SetLineCap) },
{ SetLineDashPattern.Symbol, typeof(SetLineDashPattern) },
{ SetLineJoin.Symbol, typeof(SetLineJoin) },
{ SetLineWidth.Symbol, typeof(SetLineWidth) },
{ SetMiterLimit.Symbol, typeof(SetMiterLimit) },
{ BeginInlineImage.Symbol, typeof(BeginInlineImage) },
{ BeginInlineImageData.Symbol, typeof(BeginInlineImageData) },
{ EndInlineImage.Symbol, typeof(EndInlineImage) },
{ InvokeNamedXObject.Symbol, typeof(InvokeNamedXObject) },
{ BeginMarkedContent.Symbol, typeof(BeginMarkedContent) },
{ BeginMarkedContentWithProperties.Symbol, typeof(BeginMarkedContentWithProperties) },
{ DesignateMarkedContentPoint.Symbol, typeof(DesignateMarkedContentPoint) },
{ DesignateMarkedContentPointWithProperties.Symbol, typeof(DesignateMarkedContentPointWithProperties) },
{ EndMarkedContent.Symbol, typeof(EndMarkedContent) },
{ PaintShading.Symbol, typeof(PaintShading) },
{ AppendDualControlPointBezierCurve.Symbol, typeof(AppendDualControlPointBezierCurve) },
{ AppendEndControlPointBezierCurve.Symbol, typeof(AppendEndControlPointBezierCurve) },
{ AppendRectangle.Symbol, typeof(AppendRectangle) },
{ AppendStartControlPointBezierCurve.Symbol, typeof(AppendStartControlPointBezierCurve) },
{ AppendStraightLineSegment.Symbol, typeof(AppendStraightLineSegment) },
{ BeginNewSubpath.Symbol, typeof(BeginNewSubpath) },
{ CloseSubpath.Symbol, typeof(CloseSubpath) },
{ CloseAndStrokePath.Symbol, typeof(CloseAndStrokePath) },
{ CloseFillPathEvenOddRuleAndStroke.Symbol, typeof(CloseFillPathEvenOddRuleAndStroke) },
{ CloseFillPathNonZeroWindingAndStroke.Symbol, typeof(CloseFillPathNonZeroWindingAndStroke) },
{ EndPath.Symbol, typeof(EndPath) },
{ FillPathEvenOddRule.Symbol, typeof(FillPathEvenOddRule) },
{ FillPathEvenOddRuleAndStroke.Symbol, typeof(FillPathEvenOddRuleAndStroke) },
{ FillPathNonZeroWinding.Symbol, typeof(FillPathNonZeroWinding) },
{ FillPathNonZeroWindingAndStroke.Symbol, typeof(FillPathNonZeroWindingAndStroke) },
{ FillPathNonZeroWindingCompatibility.Symbol, typeof(FillPathNonZeroWindingCompatibility) },
{ StrokePath.Symbol, typeof(StrokePath) },
{ SetNonStrokeColor.Symbol, typeof(SetNonStrokeColor) },
{ SetNonStrokeColorAdvanced.Symbol, typeof(SetNonStrokeColorAdvanced) },
{ SetNonStrokeColorDeviceCmyk.Symbol, typeof(SetNonStrokeColorDeviceCmyk) },
{ SetNonStrokeColorDeviceGray.Symbol, typeof(SetNonStrokeColorDeviceGray) },
{ SetNonStrokeColorDeviceRgb.Symbol, typeof(SetNonStrokeColorDeviceRgb) },
{ SetNonStrokeColorSpace.Symbol, typeof(SetNonStrokeColorSpace) },
{ SetStrokeColor.Symbol, typeof(SetStrokeColor) },
{ SetStrokeColorAdvanced.Symbol, typeof(SetStrokeColorAdvanced) },
{ SetStrokeColorDeviceCmyk.Symbol, typeof(SetStrokeColorDeviceCmyk) },
{ SetStrokeColorDeviceGray.Symbol, typeof(SetStrokeColorDeviceGray) },
{ SetStrokeColorDeviceRgb.Symbol, typeof(SetStrokeColorDeviceRgb) },
{ SetStrokeColorSpace.Symbol, typeof(SetStrokeColorSpace) },
{ ModifyCurrentTransformationMatrix.Symbol, typeof(ModifyCurrentTransformationMatrix) },
{ Pop.Symbol, typeof(Pop) },
{ Push.Symbol, typeof(Push) },
{ SetGraphicsStateParametersFromDictionary.Symbol, typeof(SetGraphicsStateParametersFromDictionary) },
{ BeginText.Symbol, typeof(BeginText) },
{ EndText.Symbol, typeof(EndText) },
{ MoveToNextLine.Symbol, typeof(MoveToNextLine) },
{ MoveToNextLineWithOffset.Symbol, typeof(MoveToNextLineWithOffset) },
{ MoveToNextLineWithOffsetSetLeading.Symbol, typeof(MoveToNextLineWithOffsetSetLeading) },
{ SetTextMatrix.Symbol, typeof(SetTextMatrix) },
{ MoveToNextLineShowText.Symbol, typeof(MoveToNextLineShowText) },
{ MoveToNextLineShowTextWithSpacing.Symbol, typeof(MoveToNextLineShowTextWithSpacing) },
{ ShowText.Symbol, typeof(ShowText) },
{ ShowTextsWithPositioning.Symbol, typeof(ShowTextsWithPositioning) },
{ SetCharacterSpacing.Symbol, typeof(SetCharacterSpacing) },
{ SetFontAndSize.Symbol, typeof(SetFontAndSize) },
{ SetHorizontalScaling.Symbol, typeof(SetHorizontalScaling) },
{ SetTextLeading.Symbol, typeof(SetTextLeading) },
{ SetTextRenderingMode.Symbol, typeof(SetTextRenderingMode) },
{ SetTextRise.Symbol, typeof(SetTextRise) },
{ SetWordSpacing.Symbol, typeof(SetWordSpacing) },
{ Type3SetGlyphWidth.Symbol, typeof(Type3SetGlyphWidth) },
{ Type3SetGlyphWidthAndBoundingBox.Symbol, typeof(Type3SetGlyphWidthAndBoundingBox) }
};
public ReflectionGraphicsStateOperationFactory()
{
//var assemblyTypes = Assembly.GetAssembly(typeof(ReflectionGraphicsStateOperationFactory)).GetTypes();
//var result = new Dictionary<string, Type>();
//foreach (var assemblyType in assemblyTypes)
//{
// if (!assemblyType.IsInterface && typeof(IGraphicsStateOperation).IsAssignableFrom(assemblyType))
// {
// var symbol = assemblyType.GetField("Symbol");
// if (symbol == null)
// {
// throw new InvalidOperationException("An operation type was defined without the public const Symbol being declared. Type was: " + assemblyType.FullName);
// }
// var value = symbol.GetValue(null).ToString();
// result[value] = assemblyType;
// }
//}
//operations = result;
}
private static double[] TokensToDoubleArray(IReadOnlyList<IToken> tokens, bool exceptLast = false)
{
var result = DoubleListPool.Borrow();
for (var i = 0; i < tokens.Count - (exceptLast ? 1 : 0); i++)
{
var operand = tokens[i];
if (operand is ArrayToken arr)
{
for (var j = 0; j < arr.Length; j++)
{
var innerOperand = arr[j];
if (!(innerOperand is NumericToken innerNumeric))
{
var val = result.ToArray();
DoubleListPool.Return(result);
return val.ToArray();
}
result.Add(innerNumeric.Data);
}
}
if (!(operand is NumericToken numeric))
{
var val = result.ToArray();
DoubleListPool.Return(result);
return val.ToArray();
}
result.Add(numeric.Data);
}
var returnValue = result.ToArray();
DoubleListPool.Return(result);
return returnValue;
}
private static int OperandToInt(IToken token)
{
if (!(token is NumericToken numeric))
{
throw new InvalidOperationException($"Invalid operand token encountered when expecting numeric: {token}.");
}
return numeric.Int;
}
private static double OperandToDouble(IToken token)
{
if (!(token is NumericToken numeric))
{
throw new InvalidOperationException($"Invalid operand token encountered when expecting numeric: {token}.");
}
return numeric.Data;
}
public IGraphicsStateOperation? Create(OperatorToken op, IReadOnlyList<IToken> operands)
{
switch (op.Data)
{
case ModifyClippingByEvenOddIntersect.Symbol:
return ModifyClippingByEvenOddIntersect.Value;
case ModifyClippingByNonZeroWindingIntersect.Symbol:
return ModifyClippingByNonZeroWindingIntersect.Value;
case BeginCompatibilitySection.Symbol:
return BeginCompatibilitySection.Value;
case EndCompatibilitySection.Symbol:
return EndCompatibilitySection.Value;
case SetColorRenderingIntent.Symbol:
return new SetColorRenderingIntent((NameToken)operands[0]);
case SetFlatnessTolerance.Symbol:
if (operands.Count == 0)
{
return null; // Should not happen by definition
}
return new SetFlatnessTolerance(OperandToDouble(operands[0]));
case SetLineCap.Symbol:
return new SetLineCap(OperandToInt(operands[0]));
case SetLineDashPattern.Symbol:
return new SetLineDashPattern(TokensToDoubleArray(operands, true), OperandToInt(operands[operands.Count - 1]));
case SetLineJoin.Symbol:
return new SetLineJoin(OperandToInt(operands[0]));
case SetLineWidth.Symbol:
return new SetLineWidth(OperandToDouble(operands[0]));
case SetMiterLimit.Symbol:
return new SetMiterLimit(OperandToDouble(operands[0]));
case AppendDualControlPointBezierCurve.Symbol:
if (operands.Count == 0)
{
return null;
}
return new AppendDualControlPointBezierCurve(OperandToDouble(operands[0]),
OperandToDouble(operands[1]),
OperandToDouble(operands[2]),
OperandToDouble(operands[3]),
OperandToDouble(operands[4]),
OperandToDouble(operands[5]));
case AppendEndControlPointBezierCurve.Symbol:
if (operands.Count == 0)
{
return null;
}
return new AppendEndControlPointBezierCurve(OperandToDouble(operands[0]),
OperandToDouble(operands[1]),
OperandToDouble(operands[2]),
OperandToDouble(operands[3]));
case AppendRectangle.Symbol:
if (operands.Count == 0)
{
return null;
}
return new AppendRectangle(OperandToDouble(operands[0]),
OperandToDouble(operands[1]),
OperandToDouble(operands[2]),
OperandToDouble(operands[3]));
case AppendStartControlPointBezierCurve.Symbol:
if (operands.Count == 0)
{
return null;
}
return new AppendStartControlPointBezierCurve(OperandToDouble(operands[0]),
OperandToDouble(operands[1]),
OperandToDouble(operands[2]),
OperandToDouble(operands[3]));
case AppendStraightLineSegment.Symbol:
return new AppendStraightLineSegment(OperandToDouble(operands[0]),
OperandToDouble(operands[1]));
case BeginNewSubpath.Symbol:
return new BeginNewSubpath(OperandToDouble(operands[0]),
OperandToDouble(operands[1]));
case CloseSubpath.Symbol:
return CloseSubpath.Value;
case ModifyCurrentTransformationMatrix.Symbol:
return new ModifyCurrentTransformationMatrix(TokensToDoubleArray(operands));
case Pop.Symbol:
return Pop.Value;
case Push.Symbol:
return Push.Value;
case SetGraphicsStateParametersFromDictionary.Symbol:
return new SetGraphicsStateParametersFromDictionary((NameToken)operands[0]);
case BeginText.Symbol:
return BeginText.Value;
case EndText.Symbol:
return EndText.Value;
case SetCharacterSpacing.Symbol:
return new SetCharacterSpacing(OperandToDouble(operands[0]));
case SetFontAndSize.Symbol:
return new SetFontAndSize((NameToken)operands[0], OperandToDouble(operands[1]));
case SetHorizontalScaling.Symbol:
return new SetHorizontalScaling(OperandToDouble(operands[0]));
case SetTextLeading.Symbol:
return new SetTextLeading(OperandToDouble(operands[0]));
case SetTextRenderingMode.Symbol:
return new SetTextRenderingMode(OperandToInt(operands[0]));
case SetTextRise.Symbol:
return new SetTextRise(OperandToDouble(operands[0]));
case SetWordSpacing.Symbol:
return new SetWordSpacing(OperandToDouble(operands[0]));
case CloseAndStrokePath.Symbol:
return CloseAndStrokePath.Value;
case CloseFillPathEvenOddRuleAndStroke.Symbol:
return CloseFillPathEvenOddRuleAndStroke.Value;
case CloseFillPathNonZeroWindingAndStroke.Symbol:
return CloseFillPathNonZeroWindingAndStroke.Value;
case BeginInlineImage.Symbol:
return BeginInlineImage.Value;
case BeginMarkedContent.Symbol:
return new BeginMarkedContent((NameToken)operands[0]);
case BeginMarkedContentWithProperties.Symbol:
var bdcName = (NameToken)operands[0];
if (operands[1] is DictionaryToken contentSequenceDictionary)
{
return new BeginMarkedContentWithProperties(bdcName, contentSequenceDictionary);
}
else if (operands[1] is NameToken contentSequenceName)
{
return new BeginMarkedContentWithProperties(bdcName, contentSequenceName);
}
var errorMessageBdc = string.Join(", ", operands.Select(x => x.ToString()));
throw new PdfDocumentFormatException($"Attempted to set a marked-content sequence with invalid parameters: [{errorMessageBdc}]");
case DesignateMarkedContentPoint.Symbol:
return new DesignateMarkedContentPoint((NameToken)operands[0]);
case DesignateMarkedContentPointWithProperties.Symbol:
var dpName = (NameToken)operands[0];
if (operands[1] is DictionaryToken contentPointDictionary)
{
return new DesignateMarkedContentPointWithProperties(dpName, contentPointDictionary);
}
else if (operands[1] is NameToken contentPointName)
{
return new DesignateMarkedContentPointWithProperties(dpName, contentPointName);
}
var errorMessageDp = string.Join(", ", operands.Select(x => x.ToString()));
throw new PdfDocumentFormatException($"Attempted to set a marked-content point with invalid parameters: [{errorMessageDp}]");
case EndMarkedContent.Symbol:
return EndMarkedContent.Value;
case EndPath.Symbol:
return EndPath.Value;
case FillPathEvenOddRule.Symbol:
return FillPathEvenOddRule.Value;
case FillPathEvenOddRuleAndStroke.Symbol:
return FillPathEvenOddRuleAndStroke.Value;
case FillPathNonZeroWinding.Symbol:
return FillPathNonZeroWinding.Value;
case FillPathNonZeroWindingAndStroke.Symbol:
return FillPathNonZeroWindingAndStroke.Value;
case FillPathNonZeroWindingCompatibility.Symbol:
return FillPathNonZeroWindingCompatibility.Value;
case InvokeNamedXObject.Symbol:
return new InvokeNamedXObject((NameToken)operands[0]);
case MoveToNextLine.Symbol:
return MoveToNextLine.Value;
case MoveToNextLineShowText.Symbol:
if (operands.Count != 1)
{
throw new InvalidOperationException($"Attempted to create a move to next line and show text operation with {operands.Count} operands.");
}
if (operands[0] is StringToken snl)
{
return new MoveToNextLineShowText(snl.Data);
}
else if (operands[0] is HexToken hnl)
{
return new MoveToNextLineShowText(hnl.Bytes.ToArray());
}
else
{
throw new InvalidOperationException($"Tried to create a move to next line and show text operation with operand type: {operands[0]?.GetType().Name ?? "null"}");
}
case MoveToNextLineWithOffset.Symbol:
return new MoveToNextLineWithOffset(OperandToDouble(operands[0]), OperandToDouble(operands[1]));
case MoveToNextLineWithOffsetSetLeading.Symbol:
return new MoveToNextLineWithOffsetSetLeading(OperandToDouble(operands[0]), OperandToDouble(operands[1]));
case PaintShading.Symbol:
return new PaintShading((NameToken)operands[0]);
case SetNonStrokeColor.Symbol:
return new SetNonStrokeColor(TokensToDoubleArray(operands));
case SetNonStrokeColorAdvanced.Symbol:
if (operands[operands.Count - 1] is NameToken scnLowerPatternName)
{
return new SetNonStrokeColorAdvanced(operands.Take(operands.Count - 1).Select(x => ((NumericToken)x).Data).ToArray(), scnLowerPatternName);
}
else if (operands.All(x => x is NumericToken))
{
return new SetNonStrokeColorAdvanced(operands.Select(x => ((NumericToken)x).Data).ToArray());
}
var errorMessageScnLower = string.Join(", ", operands.Select(x => x.ToString()));
throw new PdfDocumentFormatException($"Attempted to set a non-stroke color space (scn) with invalid arguments: [{errorMessageScnLower}]");
case SetNonStrokeColorDeviceCmyk.Symbol:
return new SetNonStrokeColorDeviceCmyk(OperandToDouble(operands[0]),
OperandToDouble(operands[1]),
OperandToDouble(operands[2]),
OperandToDouble(operands[3]));
case SetNonStrokeColorDeviceGray.Symbol:
return new SetNonStrokeColorDeviceGray(OperandToDouble(operands[0]));
case SetNonStrokeColorDeviceRgb.Symbol:
return new SetNonStrokeColorDeviceRgb(OperandToDouble(operands[0]),
OperandToDouble(operands[1]),
OperandToDouble(operands[2]));
case SetNonStrokeColorSpace.Symbol:
return new SetNonStrokeColorSpace((NameToken)operands[0]);
case SetStrokeColor.Symbol:
return new SetStrokeColor(TokensToDoubleArray(operands));
case SetStrokeColorAdvanced.Symbol:
if (operands[operands.Count - 1] is NameToken scnPatternName)
{
return new SetStrokeColorAdvanced(operands.Take(operands.Count - 1).Select(x => ((NumericToken)x).Data).ToList(), scnPatternName);
}
else if (operands.All(x => x is NumericToken))
{
return new SetStrokeColorAdvanced(operands.Select(x => ((NumericToken)x).Data).ToList());
}
var errorMessageScn = string.Join(", ", operands.Select(x => x.ToString()));
throw new PdfDocumentFormatException($"Attempted to set a stroke color space (SCN) with invalid arguments: [{errorMessageScn}]");
case SetStrokeColorDeviceCmyk.Symbol:
return new SetStrokeColorDeviceCmyk(OperandToDouble(operands[0]),
OperandToDouble(operands[1]),
OperandToDouble(operands[2]),
OperandToDouble(operands[3]));
case SetStrokeColorDeviceGray.Symbol:
return new SetStrokeColorDeviceGray(OperandToDouble(operands[0]));
case SetStrokeColorDeviceRgb.Symbol:
return new SetStrokeColorDeviceRgb(OperandToDouble(operands[0]),
OperandToDouble(operands[1]),
OperandToDouble(operands[2]));
case SetStrokeColorSpace.Symbol:
return new SetStrokeColorSpace((NameToken)operands[0]);
case SetTextMatrix.Symbol:
return new SetTextMatrix(TokensToDoubleArray(operands));
case StrokePath.Symbol:
return StrokePath.Value;
case ShowText.Symbol:
if (operands.Count != 1)
{
throw new InvalidOperationException($"Attempted to create a show text operation with {operands.Count} operands.");
}
if (operands[0] is StringToken s)
{
return new ShowText(s.Data);
}
else if (operands[0] is HexToken h)
{
return new ShowText(h.Bytes.ToArray());
}
else
{
throw new InvalidOperationException($"Tried to create a show text operation with operand type: {operands[0]?.GetType().Name ?? "null"}");
}
case ShowTextsWithPositioning.Symbol:
if (operands.Count == 0)
{
throw new InvalidOperationException("Cannot have 0 parameters for a TJ operator.");
}
if (operands.Count == 1 && operands[0] is ArrayToken arrayToken)
{
return new ShowTextsWithPositioning(arrayToken.Data);
}
var array = operands.ToArray();
return new ShowTextsWithPositioning(array);
}
if (!operations.TryGetValue(op.Data, out Type? operationType))
{
return null;
}
var constructors = operationType.GetConstructors(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
if (constructors.Length == 0)
{
throw new InvalidOperationException("No constructors to invoke were found for operation type: " + operationType.FullName);
}
// This only works by luck...
var constructor = constructors[0];
if (constructor.IsPrivate)
{
return (IGraphicsStateOperation)operationType.GetField("Value")?.GetValue(null)!;
}
var parameters = constructor.GetParameters();
var offset = 0;
var arguments = new List<object>();
foreach (var parameter in parameters)
{
if (offset >= operands.Count)
{
throw new InvalidOperationException($"Fewer operands {operands.Count} found than required ({offset + 1}) for operator: {op.Data}.");
}
if (parameter.ParameterType == typeof(double))
{
if (operands[offset] is NumericToken numeric)
{
arguments.Add(numeric.Data);
}
else
{
throw new InvalidOperationException($"Expected a double parameter for operation type {operationType.FullName}. Instead got: {operands[offset]}");
}
offset++;
}
else if (parameter.ParameterType == typeof(int))
{
if (operands[offset] is NumericToken numeric)
{
arguments.Add(numeric.Int);
}
else
{
throw new InvalidOperationException($"Expected an integer parameter for operation type {operationType.FullName}. Instead got: {operands[offset]}");
}
offset++;
}
else if (parameter.ParameterType == typeof(double[]))
{
if (operands[offset] is ArrayToken arr)
{
arguments.Add(arr.Data.OfType<NumericToken>().Select(x => x.Data).ToArray());
offset++;
continue;
}
var array = new List<double>();
while (offset < operands.Count && operands[offset] is NumericToken numeric)
{
array.Add(numeric.Data);
offset++;
}
arguments.Add(array.ToArray());
}
else if (parameter.ParameterType == typeof(NameToken))
{
if (operands[offset] is NameToken name)
{
arguments.Add(name);
}
else if (operands[offset] is StringToken s)
{
arguments.Add(NameToken.Create(s.Data));
}
else
{
throw new InvalidOperationException($"Expected a NameToken parameter for operation type {operationType.FullName}. Instead got: {operands[offset]}");
}
offset++;
}
else if (parameter.ParameterType == typeof(string))
{
if (operands[offset] is StringToken stringToken)
{
arguments.Add(stringToken.Data);
}
else if (operands[offset] is HexToken hexToken)
{
arguments.Add(hexToken.Data);
}
else
{
throw new InvalidOperationException($"Expected a string parameter for operation type {operationType.FullName}. Instead got: {operands[offset]}");
}
offset++;
}
else
{
throw new NotImplementedException($"Unsupported parameter type {parameter.ParameterType.FullName} for operation type {operationType.FullName}.");
}
}
var result = constructor.Invoke(arguments.ToArray());
return (IGraphicsStateOperation)result;
}
}
}