/// <summary>
/// Parses the data in string specified and returns the list of commands found therein
/// </summary>
public static SvgPathSegList Parse(string markup)
{
if (markup == null)
{
throw new ArgumentNullException(nameof(markup));
}
var result = new SvgPathSegList();
var buffer = new StringBuilder();
var lastCommand = '\0';
var args = new float[7];
var stream = new MarkupStringStream(markup);
while (!stream.IsAtEnd)
{
if (!stream.SkipWhitespaceUntilNextToken())
{
break;
}
var isNewCommand = char.IsLetter(stream.Peek);
var command = lastCommand = isNewCommand ? stream.Read() : lastCommand;
var argCount = GetPathCommandArgs(command);
for (var arg = 0; arg < argCount; arg++)
{
buffer.Clear();
stream.SkipWhitespaceUntilNextToken();
var gotDot = false;
while (!stream.IsAtEnd && IsNumeric(stream.Peek))
{
var c = stream.Peek;
if (((c == '-' || c == '+') && buffer.Length > 0) || (c == '.' && gotDot))
{
var last = buffer[buffer.Length - 1];
if (last != 'e' && last != 'E')
{
break;
}
}
gotDot |= c == '.';
buffer.Append(stream.Read());
}
args[arg] = float.Parse(buffer.ToString());
}
result.Add(CreatePathSegment(command, isNewCommand, args));
}
return(result);
}
/// <summary>
/// Converts all relative path segments in the specified list to absolute path
/// segments and returns the transformed list
/// </summary>
/// <param name="list">list of path segments to transform</param>
/// <returns>transformed list of path segments where all relative path segments have been converted into their absolute counterparts</returns>
public static SvgPathSegList ConvertToAbsolute(SvgPathSegList list)
{
if (list == null)
{
throw new ArgumentNullException(nameof(list));
}
var transformer = new SvgPathSegRelativeToAbsoluteConverter();
return(new SvgPathSegList(list.Select(item => item.Accept(transformer))));
}
/// <summary>
/// Converts all the curves in the path segment list to <see cref="SvgPathSegCurvetoCubicAbs">cubic bezier curves</see>
/// </summary>
/// <param name="list">list of path segments to transform</param>
/// <returns>transformed list of path segments where all curves have been replaced with cubic bezier curves</returns>
public static SvgPathSegList ConvertAllLinesAndCurvesToCubicCurves(SvgPathSegList list)
{
if (list == null)
{
throw new ArgumentNullException(nameof(list));
}
var transformer = new SvgPathSegLinesAndCurvestoCubicCurvesConverter();
foreach (var item in list)
{
item.Accept(transformer);
}
transformer.Flush();
return(transformer.Result);
}
/// <summary>
/// Multiplies all path segments in the specified list by the specified matrix. If there are any relative path segments in the
/// list then they will be converted to their absolute counterparts.
/// </summary>
/// <param name="list">list of path segments to transform</param>
/// <param name="matrix">matrix to multiply the path segment coordinates by</param>
/// <returns>transformed list of path segments where all coordinates have been multiplied by the specified matrix</returns>
public static SvgPathSegList MultiplyByMatrix(SvgPathSegList list, SvgMatrix matrix)
{
if (list == null)
{
throw new ArgumentNullException(nameof(list));
}
if (matrix == null)
{
throw new ArgumentNullException(nameof(matrix));
}
if (list.Any(i => RelativePathSegTypes.Contains(i.PathSegType)))
{
list = ConvertToAbsolute(list);
}
var transformer = new SvgPathSegMatrixTransformer(matrix);
return(new SvgPathSegList(list.Select(item => item.Accept(transformer))));
}
/// <summary> /// Multiplies all path segments in the specified list by the specified matrix. If there are any relative path segments in the /// list then they will be converted to their absolute counterparts. /// </summary> /// <param name="list">list of path segments to transform</param> /// <param name="matrix">matrix to multiply the path segment coordinates by</param> /// <returns>transformed list of path segments where all coordinates have been multiplied by the specified matrix</returns> public static SvgPathSegList MultiplyByMatrix(this SvgPathSegList list, SvgMatrix matrix) => SvgPathSegListTransformer.MultiplyByMatrix(list, matrix);
/// <summary> /// Converts all the curves in the path segment list to <see cref="SvgPathSegCurvetoCubicAbs">cubic bezier curves</see> /// </summary> /// <param name="list">list of path segments to transform</param> /// <returns>transformed list of path segments where all curves have been replaced with cubic bezier curves</returns> public static SvgPathSegList ConvertAllLinesAndCurvesToCubicCurves(this SvgPathSegList list) => SvgPathSegListTransformer.ConvertAllLinesAndCurvesToCubicCurves(list);
/// <summary> /// Converts all relative path segments in the specified list to their absolute counterparts and returns the new list. /// </summary> /// <param name="list">list of path segments to transform</param> /// <returns>transformed list of path segments where all relative path segments have been converted into their absolute counterparts</returns> public static SvgPathSegList ConvertToAbsolute(this SvgPathSegList list) => SvgPathSegListTransformer.ConvertToAbsolute(list);