public async Task PreparePropertyDescriptorAsync()
{
if (string.IsNullOrEmpty(XamlCodeFile))
{
return;
}
if (_propertyDescriptor == null)
{
// Get Xaml code
using (var codeStream = await StreamHelper.GetPackagedFileStreamAsync($"SamplePages/{Name}/{XamlCodeFile}"))
{
XamlCode = await codeStream.ReadTextAsync();
// Look for @[] values and generate associated properties
var regularExpression = new Regex(@"@\[(?<name>.+?):(?<type>.+?):(?<value>.+?)(:(?<parameters>.+?))?(:(?<options>.*))*\]");
_propertyDescriptor = new PropertyDescriptor {
Expando = new ExpandoObject()
};
var proxy = (IDictionary <string, object>)_propertyDescriptor.Expando;
foreach (Match match in regularExpression.Matches(XamlCode))
{
var name = match.Groups["name"].Value;
var type = match.Groups["type"].Value;
var value = match.Groups["value"].Value;
PropertyKind kind;
if (Enum.TryParse(type, out kind))
{
PropertyOptions options;
switch (kind)
{
case PropertyKind.Slider:
case PropertyKind.DoubleSlider:
try
{
var sliderOptions = new SliderPropertyOptions {
DefaultValue = double.Parse(value)
};
var parameters = match.Groups["parameters"].Value;
var split = parameters.Split('-');
int minIndex = 0;
int minMultiplier = 1;
if (string.IsNullOrEmpty(split[0]))
{
minIndex = 1;
minMultiplier = -1;
}
sliderOptions.MinValue = minMultiplier * double.Parse(split[minIndex]);
sliderOptions.MaxValue = double.Parse(split[minIndex + 1]);
if (split.Length > 2 + minIndex)
{
sliderOptions.Step = double.Parse(split[split.Length - 1]);
}
options = sliderOptions;
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to extract slider info from {value}({ex.Message})");
TrackingManager.TrackException(ex);
continue;
}
break;
case PropertyKind.Enum:
try
{
options = new PropertyOptions();
var split = value.Split('.');
var typeName = string.Join(".", split.Take(split.Length - 1));
var enumType = LookForTypeByName(typeName);
options.DefaultValue = Enum.Parse(enumType, split.Last());
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to parse enum from {value}({ex.Message})");
TrackingManager.TrackException(ex);
continue;
}
break;
case PropertyKind.Bool:
try
{
options = new PropertyOptions {
DefaultValue = bool.Parse(value)
};
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to parse bool from {value}({ex.Message})");
continue;
}
break;
case PropertyKind.Brush:
try
{
options = new PropertyOptions {
DefaultValue = value
};
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to parse bool from {value}({ex.Message})");
TrackingManager.TrackException(ex);
continue;
}
break;
default:
options = new PropertyOptions {
DefaultValue = value
};
break;
}
options.Name = name;
options.OriginalString = match.Value;
options.Kind = kind;
proxy[name] = new ValueHolder(options.DefaultValue);
_propertyDescriptor.Options.Add(options);
}
}
}
}
}
public async Task PreparePropertyDescriptorAsync()
{
if (string.IsNullOrEmpty(XamlCodeFile))
{
return;
}
if (_propertyDescriptor == null)
{
// Get Xaml code
using (var codeStream = await StreamHelper.GetPackagedFileStreamAsync($"SamplePages/{Name}/{XamlCodeFile}"))
{
XamlCode = await codeStream.ReadTextAsync(Encoding.UTF8);
// Look for @[] values and generate associated properties
var regularExpression = new Regex(@"@\[(?<name>.+?)(:(?<type>.+?):(?<value>.+?)(:(?<parameters>.+?))?(:(?<options>.*))*)?\]@?");
_propertyDescriptor = new PropertyDescriptor {
Expando = new ExpandoObject()
};
var proxy = (IDictionary <string, object>)_propertyDescriptor.Expando;
foreach (Match match in regularExpression.Matches(XamlCode))
{
var label = match.Groups["name"].Value;
var name = label.Replace(" ", string.Empty); // Allow us to have nicer display names, but create valid properties.
var type = match.Groups["type"].Value;
var value = match.Groups["value"].Value;
var existingOption = _propertyDescriptor.Options.Where(o => o.Name == name).FirstOrDefault();
if (existingOption == null && string.IsNullOrWhiteSpace(type))
{
throw new NotSupportedException($"Unrecognized short identifier '{name}'; Define type and parameters of property in first occurance in {XamlCodeFile}.");
}
if (Enum.TryParse(type, out PropertyKind kind))
{
if (existingOption != null)
{
if (existingOption.Kind != kind)
{
throw new NotSupportedException($"Multiple options with same name but different type not supported: {XamlCodeFile}:{name}");
}
continue;
}
PropertyOptions options;
switch (kind)
{
case PropertyKind.Slider:
case PropertyKind.DoubleSlider:
try
{
var sliderOptions = new SliderPropertyOptions {
DefaultValue = double.Parse(value, CultureInfo.InvariantCulture)
};
var parameters = match.Groups["parameters"].Value;
var split = parameters.Split('-');
int minIndex = 0;
int minMultiplier = 1;
if (string.IsNullOrEmpty(split[0]))
{
minIndex = 1;
minMultiplier = -1;
}
sliderOptions.MinValue = minMultiplier * double.Parse(split[minIndex], CultureInfo.InvariantCulture);
sliderOptions.MaxValue = double.Parse(split[minIndex + 1], CultureInfo.InvariantCulture);
if (split.Length > 2 + minIndex)
{
sliderOptions.Step = double.Parse(split[split.Length - 1], CultureInfo.InvariantCulture);
}
options = sliderOptions;
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to extract slider info from {value}({ex.Message})");
TrackingManager.TrackException(ex);
continue;
}
break;
case PropertyKind.TimeSpan:
try
{
var sliderOptions = new SliderPropertyOptions {
DefaultValue = TimeSpan.FromMilliseconds(double.Parse(value, CultureInfo.InvariantCulture))
};
var parameters = match.Groups["parameters"].Value;
var split = parameters.Split('-');
int minIndex = 0;
int minMultiplier = 1;
if (string.IsNullOrEmpty(split[0]))
{
minIndex = 1;
minMultiplier = -1;
}
sliderOptions.MinValue = minMultiplier * double.Parse(split[minIndex], CultureInfo.InvariantCulture);
sliderOptions.MaxValue = double.Parse(split[minIndex + 1], CultureInfo.InvariantCulture);
if (split.Length > 2 + minIndex)
{
sliderOptions.Step = double.Parse(split[split.Length - 1], CultureInfo.InvariantCulture);
}
options = sliderOptions;
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to extract slider info from {value}({ex.Message})");
TrackingManager.TrackException(ex);
continue;
}
break;
case PropertyKind.Enum:
try
{
options = new PropertyOptions();
var split = value.Split('.');
var typeName = string.Join(".", split.Take(split.Length - 1));
var enumType = LookForTypeByName(typeName);
options.DefaultValue = Enum.Parse(enumType, split.Last());
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to parse enum from {value}({ex.Message})");
TrackingManager.TrackException(ex);
continue;
}
break;
case PropertyKind.Bool:
try
{
options = new PropertyOptions {
DefaultValue = bool.Parse(value)
};
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to parse bool from {value}({ex.Message})");
continue;
}
break;
case PropertyKind.Brush:
try
{
options = new PropertyOptions {
DefaultValue = value
};
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to parse bool from {value}({ex.Message})");
TrackingManager.TrackException(ex);
continue;
}
break;
case PropertyKind.Thickness:
try
{
var thicknessOptions = new ThicknessPropertyOptions {
DefaultValue = value
};
options = thicknessOptions;
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to extract slider info from {value}({ex.Message})");
TrackingManager.TrackException(ex);
continue;
}
break;
default:
options = new PropertyOptions {
DefaultValue = value
};
break;
}
options.Label = label;
options.Name = name;
options.OriginalString = match.Value;
options.Kind = kind;
options.IsTwoWayBinding = options.OriginalString.EndsWith("@");
proxy[name] = new ValueHolder(options.DefaultValue);
_propertyDescriptor.Options.Add(options);
}
}
}
}
}
