/// <summary>
/// Parses the Stroke Data string and converts it into ICanvasStrokeElement.
/// </summary>
/// <param name="strokeData">Stroke Data string</param>
/// <returns>ICanvasStrokeElement</returns>
internal static ICanvasStrokeElement Parse(string strokeData)
{
var matches = RegexFactory.CanvasStrokeRegex.Matches(strokeData);
// If no match is found or no captures in the match, then it means
// that the stroke data is invalid.
if (matches.Count == 0)
{
ThrowForZeroCount();
}
// If the match contains more than one captures, it means that there
// are multiple CanvasStrokes present in the stroke data. There should
// be only one CanvasStroke defined in the stroke data.
if (matches.Count > 1)
{
ThrowForNotOneCount();
}
// There should be only one match
var match = matches[0];
var strokeElement = new CanvasStrokeElement(match);
// Perform validation to check if there are any invalid characters in the stroke data that were not captured
var preValidationCount = RegexFactory.ValidationRegex.Replace(strokeData, string.Empty).Length;
var postValidationCount = strokeElement.ValidationCount;
// If there are invalid characters, extract them and add them to the ArgumentException message
if (preValidationCount != postValidationCount)
{
static void ThrowForInvalidCharacters(CanvasStrokeElement strokeElement, string strokeData)
{
var parseIndex = 0;
if (!string.IsNullOrWhiteSpace(strokeElement.Data))
{
parseIndex = strokeData.IndexOf(strokeElement.Data, parseIndex, StringComparison.Ordinal);
}
var errorString = strokeData.Substring(parseIndex);
if (errorString.Length > 30)
{
errorString = $"{errorString.Substring(0, 30)}...";
}
throw new ArgumentException($"STROKE_ERR003:Stroke data contains invalid characters!\nIndex: {parseIndex}\n{errorString}");
}
/// <summary>
/// Parses the Stroke Data string and converts it into ICanvasStrokeElement
/// </summary>
/// <param name="strokeData">Stroke Data string</param>
/// <returns>ICanvasStrokeElement</returns>
internal static ICanvasStrokeElement Parse(string strokeData)
{
var matches = RegexFactory.CanvasStrokeRegex.Matches(strokeData);
// If no match is found or no captures in the match, then it means
// that the stroke data is invalid.
if ((matches == null) || (matches.Count == 0))
{
throw new ArgumentException($"Invalid Stroke data!\nStroke Data: {strokeData}", nameof(strokeData));
}
// If the match contains more than one captures, it means that there
// are multiple CanvasStrokes present in the stroke data. There should
// be only one CanvasStroke defined in the stroke data.
if (matches.Count > 1)
{
throw new ArgumentException("Multiple CanvasStrokes defined in Stroke Data! " +
"There should be only one CanvasStroke definition within the Stroke Data. " +
"You can either remove CanvasStroke definitions or split the Stroke Data " +
"into multiple Stroke Data and call the CanvasObject.CreateStroke() method on each of them." +
$"\nStroke Data: {strokeData}");
}
// There should be only one match
var match = matches[0];
var strokeElement = new CanvasStrokeElement(match);
// Perform validation to check if there are any invalid characters in the stroke data that were not captured
var preValidationCount = RegexFactory.ValidationRegex.Replace(strokeData, string.Empty).Length;
var postValidationCount = strokeElement.ValidationCount;
if (preValidationCount != postValidationCount)
{
throw new ArgumentException($"Stroke data contains invalid characters!\nStroke Data: {strokeData}", nameof(strokeData));
}
return(strokeElement);
}
