void ReadPath (Path p, string pathDescriptor)
{
Match m = pathRegex.Match(pathDescriptor);
while(m.Success)
{
var match = m.Value.TrimStart ();
var op = match[0];
if (op == 'z' || op == 'Z') {
p.Close ();
} else {
// make sure negative numbers are split properly
match = negativeNumberRe.Replace(match.Substring(1), " -");
var args = match.Split(WSC, StringSplitOptions.RemoveEmptyEntries);
Point previousPoint = new Point ();
int index = 0;
while(index < args.Length)
{
if (p.Operations.Count > 0 && !(p.Operations.Last() is ClosePath))
previousPoint = p.Operations.Last().EndPoint;
if ((op == 'M' || op == 'm') && args.Length >= index+2) {
var point = new Point (ReadNumber (args [index]), ReadNumber (args [index+1]));
if (op == 'm')
point += previousPoint;
p.MoveTo (point);
index += 2;
} else if ((op == 'L' || op == 'l') && args.Length >= index+2) {
var point = new Point (ReadNumber (args [index]), ReadNumber (args [index+1]));
if (op == 'l')
point += previousPoint;
p.LineTo (point);
index += 2;
} else if ((op == 'C' || op == 'c') && args.Length >= index+6) {
var c1 = new Point (ReadNumber (args [index]), ReadNumber (args [index+1]));
var c2 = new Point (ReadNumber (args [index+2]), ReadNumber (args [index+3]));
var pt = new Point (ReadNumber (args [index+4]), ReadNumber (args [index+5]));
if (op == 'c')
{
c1 += previousPoint;
c2 += previousPoint;
pt += previousPoint;
}
p.CurveTo (c1, c2, pt);
index += 6;
} else if ((op == 'S' || op == 's') && args.Length >= index+4) {
var c = new Point (ReadNumber (args [index]), ReadNumber (args [index+1]));
var pt = new Point (ReadNumber (args [index+2]), ReadNumber (args [index+3]));
if (op == 's')
{
c += previousPoint;
pt += previousPoint;
}
p.ContinueCurveTo (c, pt);
index += 4;
} else if ((op == 'A' || op == 'a') && args.Length >= index+7) {
var r = new Size (ReadNumber (args [index]), ReadNumber (args [index+1]));
// var xr = ReadNumber (args [i + 2]);
var laf = ReadNumber (args [index+3]) != 0;
var swf = ReadNumber (args [index+4]) != 0;
var pt = new Point (ReadNumber (args [index+5]), ReadNumber (args [index+6]));
if (op == 'a')
pt += previousPoint;
p.ArcTo (r, laf, swf, pt);
index += 7;
} else if ((op == 'V' || op == 'v') && args.Length >= index+1 && p.Operations.Count > 0) {
var previousX = previousPoint.X;
var y = ReadNumber(args[index]);
if (op == 'v')
y += previousPoint.Y;
var point = new Point(previousX, y);
p.LineTo(point);
index += 1;
} else if ((op == 'H' || op == 'h') && args.Length >= index+1 && p.Operations.Count > 0) {
var previousY = previousPoint.Y;
var x = ReadNumber(args[index]);
if (op == 'h')
x += previousPoint.X;
var point = new Point(x, previousY);
p.LineTo(point);
index += 1;
} else {
throw new NotSupportedException ("Path Operation " + op);
}
}
}
m = m.NextMatch();
}
}
void ReadPath(Path p, string pathDescriptor)
{
Match m = pathRegex.Match(pathDescriptor);
while (m.Success)
{
var match = m.Value.TrimStart();
var op = match[0];
if (op == 'z' || op == 'Z')
{
p.Close();
}
else
{
// make sure negative numbers are split properly
match = negativeNumberRe.Replace(match.Substring(1), " -");
var args = match.Split(WSC, StringSplitOptions.RemoveEmptyEntries);
Point previousPoint = new Point();
int index = 0;
while (index < args.Length)
{
if (p.Operations.Count > 0 && !(p.Operations.Last() is ClosePath))
{
previousPoint = p.Operations.Last().EndPoint;
}
if ((op == 'M' || op == 'm') && args.Length >= index + 2)
{
var point = new Point(ReadNumber(args [index]), ReadNumber(args [index + 1]));
if (op == 'm')
{
point += previousPoint;
}
p.MoveTo(point);
index += 2;
}
else if ((op == 'L' || op == 'l') && args.Length >= index + 2)
{
var point = new Point(ReadNumber(args [index]), ReadNumber(args [index + 1]));
if (op == 'l')
{
point += previousPoint;
}
p.LineTo(point);
index += 2;
}
else if ((op == 'C' || op == 'c') && args.Length >= index + 6)
{
var c1 = new Point(ReadNumber(args [index]), ReadNumber(args [index + 1]));
var c2 = new Point(ReadNumber(args [index + 2]), ReadNumber(args [index + 3]));
var pt = new Point(ReadNumber(args [index + 4]), ReadNumber(args [index + 5]));
if (op == 'c')
{
c1 += previousPoint;
c2 += previousPoint;
pt += previousPoint;
}
p.CurveTo(c1, c2, pt);
index += 6;
}
else if ((op == 'S' || op == 's') && args.Length >= index + 4)
{
var c = new Point(ReadNumber(args [index]), ReadNumber(args [index + 1]));
var pt = new Point(ReadNumber(args [index + 2]), ReadNumber(args [index + 3]));
if (op == 's')
{
c += previousPoint;
pt += previousPoint;
}
p.ContinueCurveTo(c, pt);
index += 4;
}
else if ((op == 'A' || op == 'a') && args.Length >= index + 7)
{
var r = new Size(ReadNumber(args [index]), ReadNumber(args [index + 1]));
// var xr = ReadNumber (args [i + 2]);
var laf = ReadNumber(args [index + 3]) != 0;
var swf = ReadNumber(args [index + 4]) != 0;
var pt = new Point(ReadNumber(args [index + 5]), ReadNumber(args [index + 6]));
if (op == 'a')
{
pt += previousPoint;
}
p.ArcTo(r, laf, swf, pt);
index += 7;
}
else if ((op == 'V' || op == 'v') && args.Length >= index + 1 && p.Operations.Count > 0)
{
var previousX = previousPoint.X;
var y = ReadNumber(args[index]);
if (op == 'v')
{
y += previousPoint.Y;
}
var point = new Point(previousX, y);
p.LineTo(point);
index += 1;
}
else if ((op == 'H' || op == 'h') && args.Length >= index + 1 && p.Operations.Count > 0)
{
var previousY = previousPoint.Y;
var x = ReadNumber(args[index]);
if (op == 'h')
{
x += previousPoint.X;
}
var point = new Point(x, previousY);
p.LineTo(point);
index += 1;
}
else
{
throw new NotSupportedException("Path Operation " + op);
}
}
}
m = m.NextMatch();
}
}
void ReadPath(Path p, string pathDescriptor)
{
Match m = pathRegex.Match(pathDescriptor);
while(m.Success)
{
var match = m.Value.Trim();
var op = match.Substring(0, 1);
// make sure negative numbers are split properly
match = match.Replace("-", " -");
var args = match.Substring(1).Split(WSC, StringSplitOptions.RemoveEmptyEntries);
Point previousPoint = new Point ();
if (p.Operations.Count > 0 && !(p.Operations.Last() is ClosePath))
previousPoint = p.Operations.Last().EndPoint;
if ((op == "M" || op == "m") && args.Length >= 2) {
var point = new Point (ReadNumber (args [0]), ReadNumber (args [1]));
if (op == "m")
point += previousPoint;
p.MoveTo (point);
} else if ((op == "L" || op == "l") && args.Length >= 2) {
var point = new Point (ReadNumber (args [0]), ReadNumber (args [1]));
if (op == "l")
point += previousPoint;
p.LineTo (point);
} else if ((op == "C" || op == "c") && args.Length >= 6) {
var c1 = new Point (ReadNumber (args [0]), ReadNumber (args [1]));
var c2 = new Point (ReadNumber (args [2]), ReadNumber (args [3]));
var pt = new Point (ReadNumber (args [4]), ReadNumber (args [5]));
if (op == "c")
{
c1 += previousPoint;
c2 += previousPoint;
pt += previousPoint;
}
p.CurveTo (c1, c2, pt);
} else if ((op == "S" || op == "s") && args.Length >= 4) {
var c = new Point (ReadNumber (args [0]), ReadNumber (args [1]));
var pt = new Point (ReadNumber (args [2]), ReadNumber (args [3]));
if (op == "s")
{
c += previousPoint;
pt += previousPoint;
}
p.ContinueCurveTo (c, pt);
} else if ((op == "A" || op == "a") && args.Length >= 7) {
var r = new Size (ReadNumber (args [0]), ReadNumber (args [1]));
// var xr = ReadNumber (args [i + 2]);
var laf = ReadNumber (args [3]) != 0;
var swf = ReadNumber (args [4]) != 0;
var pt = new Point (ReadNumber (args [5]), ReadNumber (args [6]));
if (op == "a")
pt += previousPoint;
p.ArcTo (r, laf, swf, pt);
} else if ((op == "V" || op == "v") && args.Length >= 1 && p.Operations.Count > 0) {
var previousX = previousPoint.X;
var y = ReadNumber(args[0]);
if (op == "v")
y += previousPoint.Y;
var point = new Point(previousX, y);
p.LineTo(point);
} else if ((op == "H" || op == "h") && args.Length >= 1 && p.Operations.Count > 0) {
var previousY = previousPoint.Y;
var x = ReadNumber(args[0]);
if (op == "h")
x += previousPoint.X;
var point = new Point(x, previousY);
p.LineTo(point);
} else if (op == "z" || op == "Z") {
p.Close ();
} else {
throw new NotSupportedException ("Path Operation " + op);
}
m = m.NextMatch();
}
}
void ReadPath(Path p, string pathDescriptor)
{
var args = pathDescriptor.Split (WSC, StringSplitOptions.RemoveEmptyEntries);
var i = 0;
var n = args.Length;
while (i < n) {
var a = args[i];
//
// Get the operation
//
var op = "";
if (a.Length == 1) {
op = a;
i++;
} else {
op = a.Substring (0, 1);
args [i] = a.Substring (1);
}
//
// Execute
//
if (op == "M" && i + 1 < n) {
p.MoveTo (new Point (ReadNumber (args [i]), ReadNumber (args [i + 1])));
i += 2;
} else if (op == "L" && i + 1 < n) {
p.LineTo (new Point (ReadNumber (args [i]), ReadNumber (args [i + 1])));
i += 2;
} else if (op == "C" && i + 5 < n) {
var c1 = new Point (ReadNumber (args [i]), ReadNumber (args [i + 1]));
var c2 = new Point (ReadNumber (args [i + 2]), ReadNumber (args [i + 3]));
var pt = new Point (ReadNumber (args [i + 4]), ReadNumber (args [i + 5]));
p.CurveTo (c1, c2, pt);
i += 6;
} else if (op == "S" && i + 3 < n) {
var c = new Point (ReadNumber (args [i]), ReadNumber (args [i + 1]));
var pt = new Point (ReadNumber (args [i + 2]), ReadNumber (args [i + 3]));
p.ContinueCurveTo (c, pt);
i += 4;
} else if (op == "A" && i + 6 < n) {
var r = new Size (ReadNumber (args [i]), ReadNumber (args [i + 1]));
// var xr = ReadNumber (args [i + 2]);
var laf = ReadNumber (args [i + 3]) != 0;
var swf = ReadNumber (args [i + 4]) != 0;
var pt = new Point (ReadNumber (args [i + 5]), ReadNumber (args [i + 6]));
p.ArcTo (r, laf, swf, pt);
i += 7;
} else if (op == "z" || op == "Z") {
p.Close ();
} else {
throw new NotSupportedException ("Path Operation " + op);
}
}
}
void ReadPath(Path p, string pathDescriptor)
{
var args = pathDescriptor.Split(WSC, StringSplitOptions.RemoveEmptyEntries);
var i = 0;
var n = args.Length;
while (i < n)
{
var a = args[i];
//
// Get the operation
//
var op = "";
if (a.Length == 1)
{
op = a;
i++;
}
else
{
op = a.Substring(0, 1);
args [i] = a.Substring(1);
}
//
// Execute
//
if (op == "M" && i + 1 < n)
{
p.MoveTo(new Point(ReadNumber(args [i]), ReadNumber(args [i + 1])));
i += 2;
}
else if (op == "L" && i + 1 < n)
{
p.LineTo(new Point(ReadNumber(args [i]), ReadNumber(args [i + 1])));
i += 2;
}
else if (op == "C" && i + 5 < n)
{
var c1 = new Point(ReadNumber(args [i]), ReadNumber(args [i + 1]));
var c2 = new Point(ReadNumber(args [i + 2]), ReadNumber(args [i + 3]));
var pt = new Point(ReadNumber(args [i + 4]), ReadNumber(args [i + 5]));
p.CurveTo(c1, c2, pt);
i += 6;
}
else if (op == "S" && i + 3 < n)
{
var c = new Point(ReadNumber(args [i]), ReadNumber(args [i + 1]));
var pt = new Point(ReadNumber(args [i + 2]), ReadNumber(args [i + 3]));
p.ContinueCurveTo(c, pt);
i += 4;
}
else if (op == "A" && i + 6 < n)
{
var r = new Size(ReadNumber(args [i]), ReadNumber(args [i + 1]));
// var xr = ReadNumber (args [i + 2]);
var laf = ReadNumber(args [i + 3]) != 0;
var swf = ReadNumber(args [i + 4]) != 0;
var pt = new Point(ReadNumber(args [i + 5]), ReadNumber(args [i + 6]));
p.ArcTo(r, laf, swf, pt);
i += 7;
}
else if (op == "z" || op == "Z")
{
p.Close();
}
else
{
throw new NotSupportedException("Path Operation " + op);
}
}
}
void ReadPath(Path p, string pathDescriptor)
{
Match m = pathRegex.Match(pathDescriptor);
while (m.Success)
{
var match = m.Value.TrimStart();
var op = match[0];
var args = match.Substring(1).Split(WSC, StringSplitOptions.RemoveEmptyEntries);
Point previousPoint = new Point();
if (p.Operations.Count > 0 && !(p.Operations.Last() is ClosePath))
{
previousPoint = p.Operations.Last().EndPoint;
}
if ((op == 'M' || op == 'm') && args.Length >= 2)
{
int pos = 0;
while (pos + 1 < args.Length)
{
var point = new Point(ReadNumber(args[pos + 0]), ReadNumber(args[pos + 1]));
if (op == 'm')
{
point += previousPoint;
}
p.MoveTo(point);
pos += 2;
}
}
else if ((op == 'L' || op == 'l') && args.Length >= 2)
{
int pos = 0;
while (pos + 1 < args.Length)
{
var point = new Point(ReadNumber(args[pos + 0]), ReadNumber(args[pos + 1]));
if (op == 'l')
{
point += previousPoint;
}
p.LineTo(point);
pos += 2;
}
}
else if ((op == 'C' || op == 'c') && args.Length >= 6)
{
int pos = 0;
while (pos + 5 < args.Length)
{
var c1 = new Point(ReadNumber(args[pos + 0]), ReadNumber(args[pos + 1]));
var c2 = new Point(ReadNumber(args[pos + 2]), ReadNumber(args[pos + 3]));
var pt = new Point(ReadNumber(args[pos + 4]), ReadNumber(args[pos + 5]));
if (op == 'c')
{
c1 += previousPoint;
c2 += previousPoint;
pt += previousPoint;
}
p.CurveTo(c1, c2, pt);
pos += 6;
}
}
else if ((op == 'S' || op == 's') && args.Length >= 4)
{
int pos = 0;
while (pos + 3 < args.Length)
{
var c = new Point(ReadNumber(args[pos + 0]), ReadNumber(args[pos + 1]));
var pt = new Point(ReadNumber(args[pos + 2]), ReadNumber(args[pos + 3]));
if (op == 's')
{
c += previousPoint;
pt += previousPoint;
}
p.ContinueCurveTo(c, pt);
pos += 4;
}
}
else if ((op == 'Q' || op == 'q') && args.Length >= 4)
{
int pos = 0;
while (pos + 3 < args.Length)
{
var c1 = new Point(ReadNumber(args[pos + 0]), ReadNumber(args[pos + 1]));
var pt = new Point(ReadNumber(args[pos + 2]), ReadNumber(args[pos + 3]));
if (op == 'q')
{
c1 += previousPoint;
pt += previousPoint;
}
p.CurveTo(new Point(double.NaN, double.NaN), c1, pt);
pos += 4;
}
}
else if ((op == 'A' || op == 'a') && args.Length >= 7)
{
int pos = 0;
while (pos + 6 < args.Length)
{
var r = new Size(ReadNumber(args[pos + 0]), ReadNumber(args[pos + 1]));
var xr = ReadNumber(args[pos + 2]);
var laf = ReadNumber(args[pos + 3]) != 0;
var swf = ReadNumber(args[pos + 4]) != 0;
var pt = new Point(ReadNumber(args[pos + 5]), ReadNumber(args[pos + 6]));
if (op == 'a')
{
pt += previousPoint;
}
p.ArcTo(r, laf, swf, pt, xr);
pos += 7;
}
}
else if ((op == 'V' || op == 'v') && args.Length >= 1 && p.Operations.Count > 0)
{
int pos = 0;
while (pos < args.Length)
{
var previousX = previousPoint.X;
var y = ReadNumber(args[pos + 0]);
if (op == 'v')
{
y += previousPoint.Y;
}
var point = new Point(previousX, y);
p.LineTo(point);
pos += 1;
}
}
else if ((op == 'H' || op == 'h') && args.Length >= 1 && p.Operations.Count > 0)
{
int pos = 0;
while (pos < args.Length)
{
var previousY = previousPoint.Y;
var x = ReadNumber(args[pos + 0]);
if (op == 'h')
{
x += previousPoint.X;
}
var point = new Point(x, previousY);
p.LineTo(point);
pos += 1;
}
}
else if (op == 'z' || op == 'Z')
{
p.Close();
}
else
{
throw new NotSupportedException("Path Operation " + op);
}
m = m.NextMatch();
}
}
void ReadPath(Path p, string pathDescriptor)
{
Point previousPoint = new Point();
var tokens = LexPath(pathDescriptor);
var ntokens = tokens.Count;
var it = 0;
var argsLength = 0;
var argsStartIndex = 0;
double Arg(int index) => tokens[argsStartIndex + index].Value;
while (it < ntokens)
{
while (it < ntokens && tokens[it].IsNumber)
{
it++;
}
if (it >= ntokens)
{
break;
}
var op = tokens[it].Operator;
var itEnd = it + 1;
while (itEnd < ntokens && tokens[itEnd].IsNumber)
{
itEnd++;
}
argsStartIndex = it + 1;
argsLength = itEnd - argsStartIndex;
if (op == 'z' || op == 'Z')
{
p.Close();
}
else if (op == 'M' || op == 'm')
{
var i = 0;
while (i + 1 < argsLength)
{
var point = new Point(Arg(i), Arg(i + 1));
if (op == 'm')
{
point += previousPoint;
}
if (i == 0)
{
p.MoveTo(point);
}
else
{
p.LineTo(point);
}
previousPoint = point;
i += 2;
}
}
else if (op == 'L' || op == 'l')
{
var i = 0;
while (i + 1 < argsLength)
{
var point = new Point(Arg(i), Arg(i + 1));
if (op == 'l')
{
point += previousPoint;
}
p.LineTo(point);
previousPoint = point;
i += 2;
}
}
else if (op == 'C' || op == 'c')
{
var i = 0;
while (i + 5 < argsLength)
{
var c1 = new Point(Arg(i + 0), Arg(i + 1));
var c2 = new Point(Arg(i + 2), Arg(i + 3));
var pt = new Point(Arg(i + 4), Arg(i + 5));
if (op == 'c')
{
c1 += previousPoint;
c2 += previousPoint;
pt += previousPoint;
}
p.CurveTo(c1, c2, pt);
previousPoint = pt;
i += 6;
}
}
else if (op == 'S' || op == 's')
{
var i = 0;
while (i + 3 < argsLength)
{
var c = new Point(Arg(i + 0), Arg(i + 1));
var pt = new Point(Arg(i + 2), Arg(i + 3));
if (op == 's')
{
c += previousPoint;
pt += previousPoint;
}
p.ContinueCurveTo(c, pt);
previousPoint = pt;
i += 4;
}
}
else if (op == 'A' || op == 'a')
{
var i = 0;
while (i + 6 < argsLength)
{
var r = new Size(Arg(i + 0), Arg(i + 1));
//var xr = Arg (i + 2);
var laf = Arg(i + 3) != 0;
var swf = Arg(i + 4) != 0;
var pt = new Point(Arg(i + 5), Arg(i + 6));
if (op == 'a')
{
pt += previousPoint;
}
p.ArcTo(r, laf, swf, pt);
previousPoint = pt;
i += 7;
}
}
else if (op == 'V' || op == 'v')
{
var i = 0;
while (i < argsLength)
{
var previousX = previousPoint.X;
var y = Arg(i);
if (op == 'v')
{
y += previousPoint.Y;
}
var pt = new Point(previousX, y);
p.LineTo(pt);
previousPoint = pt;
i += 1;
}
}
else if (op == 'H' || op == 'h')
{
var i = 0;
while (i < argsLength)
{
var previousY = previousPoint.Y;
var x = Arg(i);
if (op == 'h')
{
x += previousPoint.X;
}
var pt = new Point(x, previousY);
p.LineTo(pt);
previousPoint = pt;
i += 1;
}
}
else
{
throw new NotSupportedException("Path Operation " + op);
}
it = itEnd;
}
}
