/// <summary>
/// Parse a PathFigureCollection string
/// </summary>
internal void ParseToGeometryContext(StreamGeometryContext context, string pathString, int startIndex)
{
// [BreakingChange] Dev10 Bug #453199
// We really should throw an ArgumentNullException here for context and pathString.
// From original code
// This is only used in call to Double.Parse
this.formatProvider = CultureInfo.InvariantCulture;
this.context = context;
this.pathString = pathString;
this.pathLength = pathString.Length;
this.curIndex = startIndex;
this.secondLastPoint = new Point(0, 0);
this.lastPoint = new Point(0, 0);
this.lastStart = new Point(0, 0);
this.figureStarted = false;
bool first = true;
char lastCmd = ' ';
while (this.ReadToken()) // Empty path is allowed in XAML
{
char cmd = this.token;
if (first)
{
if ((cmd != 'M') && (cmd != 'm')) // Path starts with M|m
{
this.ThrowBadToken();
}
first = false;
}
switch (cmd)
{
case 'm':
case 'M':
// XAML allows multiple points after M/m
this.lastPoint = this.ReadPoint(cmd, !this.allowComma);
context.BeginFigure(this.lastPoint, this.isFilled, !this.isClosed);
this.figureStarted = true;
this.lastStart = this.lastPoint;
lastCmd = 'M';
while (this.IsNumber(this.allowComma))
{
this.lastPoint = this.ReadPoint(cmd, !this.allowComma);
context.LineTo(this.lastPoint, this.isStroked, !this.isSmoothJoin);
lastCmd = 'L';
}
break;
case 'l':
case 'L':
case 'h':
case 'H':
case 'v':
case 'V':
this.EnsureFigure();
do
{
switch (cmd)
{
case 'l':
this.lastPoint = this.ReadPoint(cmd, !this.allowComma);
break;
case 'L':
this.lastPoint = this.ReadPoint(cmd, !this.allowComma);
break;
case 'h':
this.lastPoint.X += this.ReadNumber(!this.allowComma);
break;
case 'H':
this.lastPoint.X = this.ReadNumber(!this.allowComma);
break;
case 'v':
this.lastPoint.Y += this.ReadNumber(!this.allowComma);
break;
case 'V':
this.lastPoint.Y = this.ReadNumber(!this.allowComma);
break;
}
context.LineTo(this.lastPoint, this.isStroked, !this.isSmoothJoin);
}while (this.IsNumber(this.allowComma));
lastCmd = 'L';
break;
case 'c':
case 'C': // cubic Bezier
case 's':
case 'S': // smooth cublic Bezier
this.EnsureFigure();
do
{
Point p;
if ((cmd == 's') || (cmd == 'S'))
{
if (lastCmd == 'C')
{
p = this.Reflect();
}
else
{
p = this.lastPoint;
}
this.secondLastPoint = this.ReadPoint(cmd, !this.allowComma);
}
else
{
p = this.ReadPoint(cmd, !this.allowComma);
this.secondLastPoint = this.ReadPoint(cmd, this.allowComma);
}
this.lastPoint = this.ReadPoint(cmd, this.allowComma);
context.BezierTo(p, this.secondLastPoint, this.lastPoint, this.isStroked, !this.isSmoothJoin);
lastCmd = 'C';
}while (this.IsNumber(this.allowComma));
break;
case 'q':
case 'Q': // quadratic Bezier
case 't':
case 'T': // smooth quadratic Bezier
this.EnsureFigure();
do
{
if ((cmd == 't') || (cmd == 'T'))
{
if (lastCmd == 'Q')
{
this.secondLastPoint = this.Reflect();
}
else
{
this.secondLastPoint = this.lastPoint;
}
this.lastPoint = this.ReadPoint(cmd, !this.allowComma);
}
else
{
this.secondLastPoint = this.ReadPoint(cmd, !this.allowComma);
this.lastPoint = this.ReadPoint(cmd, this.allowComma);
}
context.QuadraticBezierTo(this.secondLastPoint, this.lastPoint, this.isStroked, !this.isSmoothJoin);
lastCmd = 'Q';
}while (this.IsNumber(this.allowComma));
break;
case 'a':
case 'A':
this.EnsureFigure();
do
{
// A 3,4 5, 0, 0, 6,7
double w = this.ReadNumber(!this.allowComma);
double h = this.ReadNumber(this.allowComma);
double rotation = this.ReadNumber(this.allowComma);
bool large = this.ReadBool();
bool sweep = this.ReadBool();
this.lastPoint = this.ReadPoint(cmd, this.allowComma);
context.ArcTo(
this.lastPoint,
new Size(w, h),
rotation,
large,
#if PBTCOMPILER
sweep,
#else
sweep ? SweepDirection.Clockwise : SweepDirection.Counterclockwise,
#endif
this.isStroked,
!this.isSmoothJoin);
}while (this.IsNumber(this.allowComma));
lastCmd = 'A';
break;
case 'z':
case 'Z':
this.EnsureFigure();
//context.SetClosedState(isClosed);
var mi = context.GetType().GetMethod("SetClosedState", BindingFlags.Instance | BindingFlags.NonPublic);
if (mi != null)
{
var pia = mi.GetParameters();
if (pia != null && pia.Length == 1 && pia[0].ParameterType == typeof(bool))
{
mi.Invoke(context, new object[] { this.isClosed });
}
}
this.figureStarted = false;
lastCmd = 'Z';
this.lastPoint = this.lastStart; // Set reference point to be first point of current figure
break;
default:
this.ThrowBadToken();
break;
}
}
}