/// <summary>
/// Parses the given style data and converts it to CanvasStrokeStyle.
/// </summary>
/// <param name="styleData">Style data</param>
/// <returns>CanvasStrokeStyle</returns>
internal static CanvasStrokeStyle Parse(string styleData)
{
var matches = RegexFactory.CanvasStrokeStyleRegex.Matches(styleData);
// If no match is found or no captures in the match, then it means that the style data is invalid.
if (matches.Count == 0)
{
ThrowForZeroCount();
}
// If the match contains more than one captures, it means that there
// are multiple CanvasStrokeStyles present in the CanvasStrokeStyle data. There should
// be only one CanvasStrokeStyle defined in the CanvasStrokeStyle data.
if (matches.Count > 1)
{
ThrowForNotOneCount();
}
// There should be only one match
var match = matches[0];
var styleElement = new CanvasStrokeStyleElement(match);
// Perform validation to check if there are any invalid characters in the brush data that were not captured
var preValidationCount = RegexFactory.ValidationRegex.Replace(styleData, string.Empty).Length;
var postValidationCount = styleElement.ValidationCount;
// If there are invalid characters, extract them and add them to the ArgumentException message
if (preValidationCount != postValidationCount)
{
static void ThrowForInvalidCharacters(CanvasStrokeStyleElement styleElement, string styleData)
{
var parseIndex = 0;
if (!string.IsNullOrWhiteSpace(styleElement.Data))
{
parseIndex = styleData.IndexOf(styleElement.Data, parseIndex, StringComparison.Ordinal);
}
var errorString = styleData.Substring(parseIndex);
if (errorString.Length > 30)
{
errorString = $"{errorString.Substring(0, 30)}...";
}
throw new ArgumentException($"STYLE_ERR003:Style data contains invalid characters!\nIndex: {parseIndex}\n{errorString}");
}
/// <summary>
/// Parses the given style data and converts it to CanvasStrokeStyle
/// </summary>
/// <param name="styleData">Style data</param>
/// <returns>CanvasStrokeStyle</returns>
internal static CanvasStrokeStyle Parse(string styleData)
{
var matches = RegexFactory.CanvasStrokeStyleRegex.Matches(styleData);
// If no match is found or no captures in the match, then it means
// that the style data is invalid.
if ((matches == null) || (matches.Count == 0))
{
throw new ArgumentException($"Invalid CanvasStrokeStyle data!\nCanvasStrokeStyle Data: {styleData}", nameof(styleData));
}
// If the match contains more than one captures, it means that there
// are multiple CanvasStrokeStyles present in the CanvasStrokeStyle data. There should
// be only one CanvasStrokeStyle defined in the CanvasStrokeStyle data.
if (matches.Count > 1)
{
throw new ArgumentException("Multiple CanvasStrokeStyles defined in CanvasStrokeStyle Data! " +
"There should be only one CanvasStrokeStyle definition within the CanvasStrokeStyle Data. " +
"You can either remove CanvasStrokeStyle definitions or split the CanvasStrokeStyle Data " +
"into multiple CanvasStrokeStyle Data and call the CanvasObject.CreateStrokeStyle() method on each of them." +
$"\nCanvasStrokeStyle Data: {styleData}");
}
// There should be only one match
var match = matches[0];
var styleElement = new CanvasStrokeStyleElement(match);
// Perform validation to check if there are any invalid characters in the brush data that were not captured
var preValidationCount = RegexFactory.ValidationRegex.Replace(styleData, string.Empty).Length;
var postValidationCount = styleElement.ValidationCount;
if (preValidationCount != postValidationCount)
{
throw new ArgumentException($"CanvasStrokeStyle data contains invalid characters!\nCanvasStrokeStyle Data: {styleData}", nameof(styleData));
}
return(styleElement.Style);
}
