/// <summary>
/// Parse a <see cref="GeoArc" /> from the boundary data in the Hatch
/// </summary>
/// <param name="list">The Tagged Data List</param>
/// <param name="index">The current index</param>
/// <returns>A GeoArc</returns>
private static GeoArc ParseCircularArcEdge(TaggedDataList list, ref int index)
{
var cpX = 0.0;
var cpY = 0.0;
var radius = 0.0;
var startAngle = 0.0;
var endAngle = 0.0;
for ( ; index < list.Length; ++index)
{
var currentData = list.GetPair(index);
switch (currentData.GroupCode)
{
case GroupCodesBase.XPoint:
cpX = double.Parse(currentData.Value);
continue;
case GroupCodesBase.YPoint:
cpY = double.Parse(currentData.Value);
continue;
case CircularArcCodes.Radius:
radius = double.Parse(currentData.Value);
continue;
case CircularArcCodes.StartAngle:
startAngle = double.Parse(currentData.Value);
continue;
case CircularArcCodes.EndAngle:
endAngle = double.Parse(currentData.Value);
continue;
case CircularArcCodes.IsCounterClockWise:
// Counter Clockwise Arc
if (currentData.Value.Contains("1"))
{
return(new GeoArc(
new Vertex(cpX, cpY),
GeoMath.DegToRad(startAngle),
GeoMath.DegToRad(endAngle), radius));
}
// AutoCAD not using Absolute angles when the
// Arc is not counter clock wise
startAngle -= 180;
endAngle -= 180;
// Clockwise Arc
return(new GeoArc(
new Vertex(cpX, cpY),
GeoMath.DegToRad(startAngle),
GeoMath.DegToRad(endAngle), radius));
default:
continue;
}
}
throw new ArgumentOutOfRangeException();
}
/// <inheritdoc />
/// <summary>
/// Main Parsing function for the LineBuffer.
/// </summary>
/// <remarks>
/// This parsing function will first try and parse
/// the information for the base class <see cref="T:Dxflib.Entities.EntityBuffer" />.
/// If that function returns false then it will attempt to parse based on
/// the <see cref="T:Dxflib.Entities.LineGroupCodes" />. If that fails then the line buffer
/// does not fill anything and the extraction process moves to the next line.
/// </remarks>
/// <param name="list">The List of Tagged Data</param>
/// <param name="index">The Index where the entity starts</param>
/// <returns>True if parse was successful</returns>
public override bool Parse(TaggedDataList list, int index)
{
// Iterate through the file and extract data until the current line
// is an entity end marker
for (var currentIndex = index + 1;
currentIndex < list.Length;
++currentIndex)
{
// The current data is set
var currentData = list.GetPair(currentIndex);
if (currentData.GroupCode == GroupCodesBase.EntityType)
{
break;
}
// Check to see if the entity bass class can parse first
if (base.Parse(list, currentIndex))
{
continue;
}
// If not then parse here
// If this class can still not parse then continue
switch (currentData.GroupCode)
{
case GroupCodesBase.XPoint:
X0 = double.Parse(currentData.Value);
continue;
case GroupCodesBase.XPointEnd:
X1 = double.Parse(currentData.Value);
continue;
case GroupCodesBase.YPoint:
Y0 = double.Parse(currentData.Value);
continue;
case GroupCodesBase.YPointEnd:
Y1 = double.Parse(currentData.Value);
continue;
case LineGroupCodes.Thickness:
Thickness = double.Parse(currentData.Value);
continue;
default:
continue;
}
}
return(true);
}
/// <inheritdoc />
/// <summary>
/// The Parse Function for the CircularArc Entity
/// </summary>
/// <param name="list">The Tagged Data list</param>
/// <param name="index">The Current Index</param>
/// <returns>Always True</returns>
public override bool Parse(TaggedDataList list, int index)
{
for (var currentIndex = index + 1; currentIndex < list.Length; ++currentIndex)
{
var currentData = list.GetPair(currentIndex);
if (currentData.GroupCode == GroupCodesBase.EntityType)
{
break;
}
if (base.Parse(list, currentIndex))
{
continue;
}
switch (currentData.GroupCode)
{
case GroupCodesBase.XPoint:
CenterPointX = double.Parse(currentData.Value);
continue;
case GroupCodesBase.YPoint:
CenterPointY = double.Parse(currentData.Value);
continue;
case GroupCodesBase.ZPoint:
CenterPointZ = double.Parse(currentData.Value);
continue;
case CircularArcCodes.Thickness:
Thickness = double.Parse(currentData.Value);
continue;
case CircularArcCodes.Radius:
Radius = double.Parse(currentData.Value);
continue;
case CircularArcCodes.StartAngle:
StartAngle = double.Parse(currentData.Value);
continue;
case CircularArcCodes.EndAngle:
EndAngle = double.Parse(currentData.Value);
continue;
default:
continue;
}
}
return(true);
}
/// <summary>
/// Parsing the Boundary Edge from edge Data
/// </summary>
/// <param name="list">The <see cref="TaggedDataList" /> list</param>
/// <param name="index">The current index</param>
/// <returns>A GeoPolyline</returns>
private static GeoPolyline ParseBoundary(TaggedDataList list, ref int index)
{
var geoPolyline = new GeoPolyline(); // The Geo Polyline to be returned
for ( ; index < list.Length; ++index)
{
var currentData = list.GetPair(index);
switch (currentData.GroupCode)
{
// Edge Types
case HatchCodes.EdgeType:
switch ((EdgeTypes)int.Parse(currentData.Value))
{
case EdgeTypes.Line:
geoPolyline.Add(ParseLineEdge(list, ref index));
break;
case EdgeTypes.CircularArc:
geoPolyline.Add(ParseCircularArcEdge(list, ref index));
break;
case EdgeTypes.EllipticalArc:
break;
case EdgeTypes.Spline:
break;
default:
throw new ArgumentOutOfRangeException();
}
continue;
// When to exit the loop
case HatchCodes.SourceObjectsCount:
--index;
return(geoPolyline);
default:
continue;
}
}
// This area of code should not be reachable
throw new ArgumentOutOfRangeException();
}
/// <summary>
/// The Parse Virtual Function that is to be overriden by
/// each entity that is to be extracted. This function also,
/// Parses global entity properties such as handle or <see cref="LayerName" />.
/// </summary>
/// <param name="list"></param>
/// <param name="index"></param>
/// <returns>True if the parse was successful</returns>
public virtual bool Parse(TaggedDataList list, int index)
{
var currentData = list.GetPair(index);
switch (currentData.GroupCode)
{
case GroupCodesBase.Handle:
Handle = currentData.Value;
return(true);
case GroupCodesBase.LayerName:
LayerName = currentData.Value;
return(true);
default:
return(false);
}
}
/// <inheritdoc />
/// <summary>
/// The Parse Function for the <see cref="T:Dxflib.Entities.Point" /> Entity
/// </summary>
/// <param name="list">The Tagged data list of group codes and values</param>
/// <param name="index">The current Index of the parser</param>
/// <returns>Always True</returns>
public override bool Parse(TaggedDataList list, int index)
{
for (var currentIndex = index + 1; currentIndex < list.Length; ++currentIndex)
{
var currentData = list.GetPair(currentIndex);
if (currentData.GroupCode == GroupCodesBase.EntityType)
{
break;
}
if (base.Parse(list, currentIndex))
{
continue;
}
switch (currentData.GroupCode)
{
case GroupCodesBase.XPoint:
X = double.Parse(currentData.Value);
continue;
case GroupCodesBase.YPoint:
Y = double.Parse(currentData.Value);
continue;
case GroupCodesBase.ZPoint:
Z = double.Parse(currentData.Value);
continue;
case PointCodes.AngleOfXAxis:
continue;
default:
continue;
}
}
return(true);
}
/// <summary>
/// Parse a geoline from a hatch boundary
/// </summary>
/// <param name="list">The <see cref="TaggedDataList" /> list</param>
/// <param name="index">The current index</param>
/// <returns>The GeoLine Parsed</returns>
private static GeoLine ParseLineEdge(TaggedDataList list, ref int index)
{
// All of the variables for the GeoLine
var x0 = 0.0;
var x1 = 0.0;
var y0 = 0.0;
// Iterate through the list
for ( ; index < list.Length; ++index)
{
var currentData = list.GetPair(index);
switch (currentData.GroupCode)
{
case GroupCodesBase.XPoint:
x0 = double.Parse(currentData.Value);
continue;
case GroupCodesBase.XPointEnd:
x1 = double.Parse(currentData.Value);
continue;
case GroupCodesBase.YPoint:
y0 = double.Parse(currentData.Value);
continue;
case GroupCodesBase.YPointEnd:
var y1 = double.Parse(currentData.Value);
// This is the last data point so return
return(new GeoLine(new Vertex(x0, y0), new Vertex(x1, y1)));
default:
continue;
}
}
// this part of the code should never be reached
throw new ArgumentOutOfRangeException();
}
/// <inheritdoc />
/// <summary>
/// The Parsing function of the MText Object
/// </summary>
/// <param name="list"></param>
/// <param name="index"></param>
/// <returns></returns>
public override bool Parse(TaggedDataList list, int index)
{
for (var currentIndex = index + 1; currentIndex < list.Length; ++currentIndex)
{
var currentData = list.GetPair(currentIndex);
if (currentData.GroupCode == GroupCodesBase.EntityType)
{
break;
}
if (base.Parse(list, currentIndex))
{
continue;
}
switch (currentData.GroupCode)
{
case GroupCodesBase.XPoint:
PositionVertex.X = double.Parse(currentData.Value);
break;
case GroupCodesBase.YPoint:
PositionVertex.Y = double.Parse(currentData.Value);
break;
case GroupCodesBase.ZPoint:
PositionVertex.Z = double.Parse(currentData.Value);
break;
case TextCodes.TextHeight:
Height = double.Parse(currentData.Value);
break;
case MTextCodes.ReferenceRectangleWidth:
ReferenceRecWidth = double.Parse(currentData.Value);
continue;
case MTextCodes.AttachmentPoint:
Justify = ParseAttachmentPoint(int.Parse(currentData.Value));
continue;
case MTextCodes.DrawDirection:
var value = int.Parse(currentData.Value);
switch (value)
{
case 1:
DrawDirection = DrawDirections.LeftToRight;
break;
case 3:
DrawDirection = DrawDirections.TopToBottom;
break;
case 5:
DrawDirection = DrawDirections.ByStyle;
break;
default:
throw new ArgumentOutOfRangeException();
}
break;
case TextCodes.TextString:
Contents = currentData.Value;
break;
case MTextCodes.AdditionalText:
Contents += currentData.Value;
break;
case TextCodes.TextStyleName:
TextStyle.Name = currentData.Value;
break;
default:
continue;
}
}
return(true);
}
/// <inheritdoc />
/// <summary>
/// Main Parse Function for the Lwpolyline Class
/// </summary>
/// <param name="list"></param>
/// <param name="index"></param>
/// <returns>True or false if the parse was successful</returns>
public override bool Parse(TaggedDataList list, int index)
{
for (var currentIndex = index + 1;
currentIndex < list.Length;
++currentIndex)
{
var currentData = list.GetPair(currentIndex);
if (currentData.GroupCode == GroupCodesBase.EntityType)
{
break;
}
if (base.Parse(list, currentIndex))
{
continue;
}
switch (currentData.GroupCode)
{
// Number of Vertices
case LwPolylineCodes.NumberOfVertices:
NumberOfVertices = int.Parse(currentData.Value);
continue;
// Lwpolyline Flag
case LwPolylineCodes.PolylineFlag:
PolyLineFlag = currentData.Value.Contains("1");
continue;
// Constant Width
case LwPolylineCodes.ConstantWidth:
ConstantWidth = double.Parse(currentData.Value);
continue;
// Elevation
case LwPolylineCodes.Elevation:
Elevation = double.Parse(currentData.Value);
continue;
// Thickness
case LwPolylineCodes.Thickness:
Thickness = double.Parse(currentData.Value);
continue;
// X values
case GroupCodesBase.XPoint:
BulgeList.Add(Bulge.BulgeNull);
XValues.Add(double.Parse(currentData.Value));
continue;
// Y values
case GroupCodesBase.YPoint:
YValues.Add(double.Parse(currentData.Value));
continue;
// Bulge Values
case LwPolylineCodes.Bulge:
BulgeList.RemoveAt(BulgeList.Count - 1);
BulgeList.Add(double.Parse(currentData.Value));
continue;
default:
continue;
}
}
return(true);
}
/// <inheritdoc />
/// <summary>
/// The Parsing Function for the <see cref="Hatch" /> entity
/// </summary>
/// <param name="list">The Tagged Data List</param>
/// <param name="index">The current index of the list</param>
/// <returns></returns>
public override bool Parse(TaggedDataList list, int index)
{
for (var currentIndex = index + 1;
currentIndex < list.Length;
++currentIndex)
{
var currentData = list.GetPair(currentIndex);
if (currentData.GroupCode == GroupCodesBase.EntityType)
{
break;
}
if (base.Parse(list, currentIndex))
{
continue;
}
switch (currentData.GroupCode)
{
// Hatch Pattern Name
case HatchCodes.HatchPatternName:
HatchPatternName = currentData.Value;
continue;
// Solid Fill Flag
case HatchCodes.SolidFillFlag:
SolidFillFlag = currentData.Value.Contains("1");
continue;
// Associativity Flag
case HatchCodes.AssociativityFlag:
AssociativityFlag = currentData.Value.Contains("1");
continue;
// Number of Boundary Paths (Loops)
case HatchCodes.NumberOfBoundaryLoops:
NumberOfLoops = int.Parse(currentData.Value);
continue;
// Hatch Style
case HatchCodes.HatchStyle:
switch ((HatchStyles)int.Parse(currentData.Value))
{
case HatchStyles.Normal:
HatchStyle = HatchStyles.Normal;
break;
case HatchStyles.Outer:
HatchStyle = HatchStyles.Outer;
break;
case HatchStyles.Ignore:
HatchStyle = HatchStyles.Ignore;
break;
default:
throw new ArgumentOutOfRangeException();
}
continue;
// Pattern Type
case HatchCodes.HatchPatternType:
switch ((HatchPatternType)int.Parse(currentData.Value))
{
case HatchPatternType.UserDefined:
PatternType = HatchPatternType.UserDefined;
break;
case HatchPatternType.Predefined:
PatternType = HatchPatternType.Predefined;
break;
case HatchPatternType.Custom:
PatternType = HatchPatternType.Custom;
break;
default:
throw new ArgumentOutOfRangeException();
}
continue;
// Pattern Angle
case HatchCodes.HatchPatternAngle:
PatternAngle = double.Parse(currentData.Value);
continue;
// Pattern Scale
case HatchCodes.HatchPatternScale:
PatternScale = double.Parse(currentData.Value);
continue;
// Parsing the Boundary Data
case HatchCodes.NumberOfEdgesInBoundary:
BoundaryEdgesCount = int.Parse(currentData.Value);
// If the polyline is associative then continue
if (AssociativityFlag)
{
continue;
}
// Set the boundary
Boundary = ParseBoundary(list, ref currentIndex);
// Throw an exception if the number of objects does not match
// what the file is saying
if (Boundary.SectionCount != BoundaryEdgesCount)
{
throw new DxfParseException(
"Boundary Objects count do not match the file");
}
continue;
// Source Objects count
case HatchCodes.SourceObjectsCount:
SourceObjectsCount = int.Parse(currentData.Value);
EntityReferenceList = new List <string>(SourceObjectsCount);
break;
// Source Object SoftPointers
case GroupCodesBase.SoftPointer:
if (SourceObjectsCount > 0)
{
EntityReferenceList.Add(currentData.Value);
}
break;
// The default case
default:
continue;
}
}
return(true);
}
/// <inheritdoc />
/// <summary>
/// The <see cref="T:Dxflib.Entities.Text.TextBuffer" /> Parse Function
/// </summary>
/// <param name="list"><see cref="T:Dxflib.IO.TaggedDataList" /> list</param>
/// <param name="index">The current index of extraction</param>
/// <returns>Always True</returns>
public override bool Parse(TaggedDataList list, int index)
{
for (var currentIndex = index + 1; currentIndex < list.Length; ++currentIndex)
{
var currentData = list.GetPair(currentIndex);
if (currentData.GroupCode == GroupCodesBase.EntityType)
{
break;
}
if (base.Parse(list, currentIndex))
{
continue;
}
switch (currentData.GroupCode)
{
case GroupCodesBase.XPoint:
PositionVertex.X = double.Parse(currentData.Value);
continue;
case GroupCodesBase.YPoint:
PositionVertex.Y = double.Parse(currentData.Value);
continue;
case GroupCodesBase.ZPoint:
PositionVertex.Z = double.Parse(currentData.Value);
continue;
case TextCodes.TextHeight:
Height = double.Parse(currentData.Value);
continue;
case TextCodes.TextString:
Contents = currentData.Value;
continue;
case TextCodes.TextRotation:
Rotation = double.Parse(currentData.Value);
continue;
case TextCodes.RelativeXScale:
WidthFactor = double.Parse(currentData.Value);
continue;
case TextCodes.ObliqueAngle:
Obliquing = double.Parse(currentData.Value);
continue;
case TextCodes.TextStyleName:
TextStyle.Name = currentData.Value;
continue;
case TextCodes.HorizontalJustification:
_horizontalJustify = int.Parse(currentData.Value);
continue;
case TextCodes.VerticalJustification:
_verticalJustify = int.Parse(currentData.Value);
continue;
case TextCodes.TextGenerationFlag:
var value = int.Parse(currentData.Value);
switch (value)
{
case 2:
IsBackwards = true;
break;
case 4:
IsUpsideDown = true;
break;
default:
throw new ArgumentOutOfRangeException();
}
continue;
default:
continue;
}
}
Justify = GetJustification(_horizontalJustify, _verticalJustify);
return(true);
}