/// <summary>
/// Converts the given object to the type of this converter, using the specified context and culture information.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"/> that provides a format context.</param>
/// <param name="culture">The <see cref="T:System.Globalization.CultureInfo"/> to use as the current culture.</param>
/// <param name="value">The <see cref="T:System.Object"/> to convert.</param>
/// <returns>
/// An <see cref="T:System.Object"/> that represents the converted value.
/// </returns>
/// <exception cref="T:System.NotSupportedException">The conversion cannot be performed. </exception>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value is string)
{
var parser = new CoordinateParser(((string)value).Trim());
var pointValue = 0.0f;
var result = new SvgPointCollection();
while (parser.TryGetFloat(out pointValue))
{
result.Add(new SvgUnit(SvgUnitType.User, pointValue));
}
return(result);
}
return(base.ConvertFrom(context, culture, value));
}
/// <summary>
/// Converts the given object to the type of this converter, using the specified context and culture information.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"/> that provides a format context.</param>
/// <param name="culture">The <see cref="T:System.Globalization.CultureInfo"/> to use as the current culture.</param>
/// <param name="value">The <see cref="T:System.Object"/> to convert.</param>
/// <returns>
/// An <see cref="T:System.Object"/> that represents the converted value.
/// </returns>
/// <exception cref="T:System.NotSupportedException">The conversion cannot be performed. </exception>
public override SvgPointCollection Convert(string value)
{
var strValue = ((string)value).Trim();
if (string.Compare(strValue, "none", StringComparison.OrdinalIgnoreCase) == 0)
{
return(null);
}
var parser = new CoordinateParser(strValue);
var pointValue = 0.0f;
var result = new SvgPointCollection();
while (parser.TryGetFloat(out pointValue))
{
result.Add(new SvgUnit(SvgUnitType.User, pointValue));
}
return(result);
}
//private static readonly SvgUnitConverter _unitConverter = new SvgUnitConverter();
/// <summary>
/// Converts the given object to the type of this converter, using the specified context and culture information.
/// </summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"/> that provides a format context.</param>
/// <param name="culture">The <see cref="T:System.Globalization.CultureInfo"/> to use as the current culture.</param>
/// <param name="value">The <see cref="T:System.Object"/> to convert.</param>
/// <returns>
/// An <see cref="T:System.Object"/> that represents the converted value.
/// </returns>
/// <exception cref="T:System.NotSupportedException">The conversion cannot be performed. </exception>
public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
{
if (value is string)
{
var strValue = ((string)value).Trim();
if (string.Compare(strValue, "none", StringComparison.InvariantCultureIgnoreCase) == 0)
{
return(null);
}
var parser = new CoordinateParser(strValue);
var pointValue = 0.0f;
var result = new SvgPointCollection();
while (parser.TryGetFloat(out pointValue))
{
result.Add(new SvgUnit(SvgUnitType.User, pointValue));
}
return(result);
}
return(base.ConvertFrom(context, culture, value));
}
private static void CreatePathSegment(char command, SvgPathSegmentList segments, CoordinateParser parser, bool isRelative)
{
var coords = new float[6];
switch (command)
{
case 'm': // relative moveto
case 'M': // moveto
if (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]))
{
segments.Add(new SvgMoveToSegment(ToAbsolute(coords[0], coords[1], segments, isRelative)));
}
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]))
{
segments.Add(new SvgLineSegment(segments.Last.End,
ToAbsolute(coords[0], coords[1], segments, isRelative)));
}
break;
case 'a':
case 'A':
bool size;
bool sweep;
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]) &&
parser.TryGetFloat(out coords[2]) && parser.TryGetBool(out size) &&
parser.TryGetBool(out sweep) && parser.TryGetFloat(out coords[3]) &&
parser.TryGetFloat(out coords[4]))
{
// A|a rx ry x-axis-rotation large-arc-flag sweep-flag x y
segments.Add(new SvgArcSegment(segments.Last.End, coords[0], coords[1], coords[2],
size ? SvgArcSize.Large : SvgArcSize.Small,
sweep ? SvgArcSweep.Positive : SvgArcSweep.Negative,
ToAbsolute(coords[3], coords[4], segments, isRelative)));
}
break;
case 'l': // relative lineto
case 'L': // lineto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]))
{
segments.Add(new SvgLineSegment(segments.Last.End,
ToAbsolute(coords[0], coords[1], segments, isRelative)));
}
break;
case 'H': // horizontal lineto
case 'h': // relative horizontal lineto
while (parser.TryGetFloat(out coords[0]))
{
segments.Add(new SvgLineSegment(segments.Last.End,
ToAbsolute(coords[0], segments.Last.End.Y, segments, isRelative, false)));
}
break;
case 'V': // vertical lineto
case 'v': // relative vertical lineto
while (parser.TryGetFloat(out coords[0]))
{
segments.Add(new SvgLineSegment(segments.Last.End,
ToAbsolute(segments.Last.End.X, coords[0], segments, false, isRelative)));
}
break;
case 'Q': // curveto
case 'q': // relative curveto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]) &&
parser.TryGetFloat(out coords[2]) && parser.TryGetFloat(out coords[3]))
{
segments.Add(new SvgQuadraticCurveSegment(segments.Last.End,
ToAbsolute(coords[0], coords[1], segments, isRelative),
ToAbsolute(coords[2], coords[3], segments, isRelative)));
}
break;
case 'T': // shorthand/smooth curveto
case 't': // relative shorthand/smooth curveto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]))
{
var lastQuadCurve = segments.Last as SvgQuadraticCurveSegment;
var controlPoint = lastQuadCurve != null
? Reflect(lastQuadCurve.ControlPoint, segments.Last.End)
: segments.Last.End;
segments.Add(new SvgQuadraticCurveSegment(segments.Last.End, controlPoint,
ToAbsolute(coords[0], coords[1], segments, isRelative)));
}
break;
case 'C': // curveto
case 'c': // relative curveto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]) &&
parser.TryGetFloat(out coords[2]) && parser.TryGetFloat(out coords[3]) &&
parser.TryGetFloat(out coords[4]) && parser.TryGetFloat(out coords[5]))
{
segments.Add(new SvgCubicCurveSegment(segments.Last.End,
ToAbsolute(coords[0], coords[1], segments, isRelative),
ToAbsolute(coords[2], coords[3], segments, isRelative),
ToAbsolute(coords[4], coords[5], segments, isRelative)));
}
break;
case 'S': // shorthand/smooth curveto
case 's': // relative shorthand/smooth curveto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]) &&
parser.TryGetFloat(out coords[2]) && parser.TryGetFloat(out coords[3]))
{
var lastCubicCurve = segments.Last as SvgCubicCurveSegment;
var controlPoint = lastCubicCurve != null
? Reflect(lastCubicCurve.SecondControlPoint, segments.Last.End)
: segments.Last.End;
segments.Add(new SvgCubicCurveSegment(segments.Last.End, controlPoint,
ToAbsolute(coords[0], coords[1], segments, isRelative),
ToAbsolute(coords[2], coords[3], segments, isRelative)));
}
break;
case 'Z': // closepath
case 'z': // relative closepath
segments.Add(new SvgClosePathSegment());
break;
}
}
private static void CreatePathSegment(char command, SvgPathSegmentList segments, ref CoordinateParserState state, ref ReadOnlySpan <char> chars)
{
var isRelative = char.IsLower(command);
// http://www.w3.org/TR/SVG11/paths.html#PathDataGeneralInformation
switch (command)
{
case 'M': // moveto
case 'm': // relative moveto
{
if (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords1, ref chars, ref state))
{
segments.Add(
new SvgMoveToSegment(
isRelative, new PointF(coords0, coords1)));
}
while (CoordinateParser.TryGetFloat(out coords0, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out coords1, ref chars, ref state))
{
segments.Add(
new SvgLineSegment(
isRelative, new PointF(coords0, coords1)));
}
}
break;
case 'A': // elliptical arc
case 'a': // relative elliptical arc
{
while (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords1, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords2, ref chars, ref state) &&
CoordinateParser.TryGetBool(out var size, ref chars, ref state) &&
CoordinateParser.TryGetBool(out var sweep, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords3, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords4, ref chars, ref state))
{
// A|a rx ry x-axis-rotation large-arc-flag sweep-flag x y
segments.Add(
new SvgArcSegment(
coords0,
coords1,
coords2,
size ? SvgArcSize.Large : SvgArcSize.Small,
sweep ? SvgArcSweep.Positive : SvgArcSweep.Negative,
isRelative, new PointF(coords3, coords4)));
}
}
break;
case 'L': // lineto
case 'l': // relative lineto
{
while (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords1, ref chars, ref state))
{
segments.Add(
new SvgLineSegment(
isRelative, new PointF(coords0, coords1)));
}
}
break;
case 'H': // horizontal lineto
case 'h': // relative horizontal lineto
{
while (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state))
{
segments.Add(
new SvgLineSegment(
isRelative, new PointF(coords0, float.NaN)));
}
}
break;
case 'V': // vertical lineto
case 'v': // relative vertical lineto
{
while (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state))
{
segments.Add(
new SvgLineSegment(
isRelative, new PointF(float.NaN, coords0)));
}
}
break;
case 'Q': // quadratic bézier curveto
case 'q': // relative quadratic bézier curveto
{
while (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords1, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords2, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords3, ref chars, ref state))
{
segments.Add(
new SvgQuadraticCurveSegment(
isRelative,
new PointF(coords0, coords1),
new PointF(coords2, coords3)));
}
}
break;
case 'T': // shorthand/smooth quadratic bézier curveto
case 't': // relative shorthand/smooth quadratic bézier curveto
{
while (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords1, ref chars, ref state))
{
segments.Add(
new SvgQuadraticCurveSegment(
isRelative, new PointF(coords0, coords1)));
}
}
break;
case 'C': // curveto
case 'c': // relative curveto
{
while (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords1, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords2, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords3, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords4, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords5, ref chars, ref state))
{
segments.Add(
new SvgCubicCurveSegment(
isRelative,
new PointF(coords0, coords1),
new PointF(coords2, coords3),
new PointF(coords4, coords5)));
}
}
break;
case 'S': // shorthand/smooth curveto
case 's': // relative shorthand/smooth curveto
{
while (CoordinateParser.TryGetFloat(out var coords0, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords1, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords2, ref chars, ref state) &&
CoordinateParser.TryGetFloat(out var coords3, ref chars, ref state))
{
segments.Add(
new SvgCubicCurveSegment(
isRelative,
new PointF(coords0, coords1),
new PointF(coords2, coords3)));
}
}
break;
case 'Z': // closepath
case 'z': // relative closepath
{
segments.Add(new SvgClosePathSegment(isRelative));
}
break;
}
}
private static void CreatePathSegment(char command, SvgPathSegmentList segments, CoordinateParser parser, bool isRelative)
{
var coords = new float[6];
switch (command)
{
case 'm': // relative moveto
case 'M': // moveto
if (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]))
{
segments.Add(new SvgMoveToSegment(ToAbsolute(coords[0], coords[1], segments, isRelative)));
}
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]))
{
segments.Add(new SvgLineSegment(segments.Last.End,
ToAbsolute(coords[0], coords[1], segments, isRelative)));
}
break;
case 'a':
case 'A':
bool size;
bool sweep;
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]) &&
parser.TryGetFloat(out coords[2]) && parser.TryGetBool(out size) &&
parser.TryGetBool(out sweep) && parser.TryGetFloat(out coords[3]) &&
parser.TryGetFloat(out coords[4]))
{
// A|a rx ry x-axis-rotation large-arc-flag sweep-flag x y
segments.Add(new SvgArcSegment(segments.Last.End, coords[0], coords[1], coords[2],
(size ? SvgArcSize.Large : SvgArcSize.Small),
(sweep ? SvgArcSweep.Positive : SvgArcSweep.Negative),
ToAbsolute(coords[3], coords[4], segments, isRelative)));
}
break;
case 'l': // relative lineto
case 'L': // lineto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]))
{
segments.Add(new SvgLineSegment(segments.Last.End,
ToAbsolute(coords[0], coords[1], segments, isRelative)));
}
break;
case 'H': // horizontal lineto
case 'h': // relative horizontal lineto
while (parser.TryGetFloat(out coords[0]))
{
segments.Add(new SvgLineSegment(segments.Last.End,
ToAbsolute(coords[0], segments.Last.End.Y, segments, isRelative, false)));
}
break;
case 'V': // vertical lineto
case 'v': // relative vertical lineto
while (parser.TryGetFloat(out coords[0]))
{
segments.Add(new SvgLineSegment(segments.Last.End,
ToAbsolute(segments.Last.End.X, coords[0], segments, false, isRelative)));
}
break;
case 'Q': // curveto
case 'q': // relative curveto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]) &&
parser.TryGetFloat(out coords[2]) && parser.TryGetFloat(out coords[3]))
{
segments.Add(new SvgQuadraticCurveSegment(segments.Last.End,
ToAbsolute(coords[0], coords[1], segments, isRelative),
ToAbsolute(coords[2], coords[3], segments, isRelative)));
}
break;
case 'T': // shorthand/smooth curveto
case 't': // relative shorthand/smooth curveto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]))
{
var lastQuadCurve = segments.Last as SvgQuadraticCurveSegment;
var controlPoint = lastQuadCurve != null
? Reflect(lastQuadCurve.ControlPoint, segments.Last.End)
: segments.Last.End;
segments.Add(new SvgQuadraticCurveSegment(segments.Last.End, controlPoint,
ToAbsolute(coords[0], coords[1], segments, isRelative)));
}
break;
case 'C': // curveto
case 'c': // relative curveto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]) &&
parser.TryGetFloat(out coords[2]) && parser.TryGetFloat(out coords[3]) &&
parser.TryGetFloat(out coords[4]) && parser.TryGetFloat(out coords[5]))
{
segments.Add(new SvgCubicCurveSegment(segments.Last.End,
ToAbsolute(coords[0], coords[1], segments, isRelative),
ToAbsolute(coords[2], coords[3], segments, isRelative),
ToAbsolute(coords[4], coords[5], segments, isRelative)));
}
break;
case 'S': // shorthand/smooth curveto
case 's': // relative shorthand/smooth curveto
while (parser.TryGetFloat(out coords[0]) && parser.TryGetFloat(out coords[1]) &&
parser.TryGetFloat(out coords[2]) && parser.TryGetFloat(out coords[3]))
{
var lastCubicCurve = segments.Last as SvgCubicCurveSegment;
var controlPoint = lastCubicCurve != null
? Reflect(lastCubicCurve.SecondControlPoint, segments.Last.End)
: segments.Last.End;
segments.Add(new SvgCubicCurveSegment(segments.Last.End, controlPoint,
ToAbsolute(coords[0], coords[1], segments, isRelative),
ToAbsolute(coords[2], coords[3], segments, isRelative)));
}
break;
case 'Z': // closepath
case 'z': // relative closepath
segments.Add(new SvgClosePathSegment());
break;
}
}