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using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using Microsoft.Maui.Controls.Build.Tasks;
using Microsoft.Maui.Controls.Xaml;
using Mono.Cecil;
using Mono.Cecil.Cil;
namespace Microsoft.Maui.Controls.XamlC
{
class ThicknessTypeConverter : ICompiledTypeConverter
{
public IEnumerable<Instruction> ConvertFromString(string value, ILContext context, BaseNode node)
{
var module = context.Body.Method.Module;
if (!string.IsNullOrEmpty(value))
{
double l, t, r, b;
var thickness = value.Split(',');
switch (thickness.Length)
{
case 1:
if (double.TryParse(thickness[0], NumberStyles.Number, CultureInfo.InvariantCulture, out l))
return GenerateIL(context, module, l);
break;
case 2:
if (double.TryParse(thickness[0], NumberStyles.Number, CultureInfo.InvariantCulture, out l) &&
double.TryParse(thickness[1], NumberStyles.Number, CultureInfo.InvariantCulture, out t))
return GenerateIL(context, module, l, t);
break;
case 4:
if (double.TryParse(thickness[0], NumberStyles.Number, CultureInfo.InvariantCulture, out l) &&
double.TryParse(thickness[1], NumberStyles.Number, CultureInfo.InvariantCulture, out t) &&
double.TryParse(thickness[2], NumberStyles.Number, CultureInfo.InvariantCulture, out r) &&
double.TryParse(thickness[3], NumberStyles.Number, CultureInfo.InvariantCulture, out b))
return GenerateIL(context, module, l, t, r, b);
break;
}
}
throw new BuildException(BuildExceptionCode.Conversion, node, null, value, typeof(Thickness));
}
IEnumerable<Instruction> GenerateIL(ILContext context, ModuleDefinition module, params double[] args)
{
foreach (var d in args)
yield return Instruction.Create(OpCodes.Ldc_R8, d);
yield return Instruction.Create(OpCodes.Newobj, module.ImportCtorReference(context.Cache, ("Microsoft.Maui", "Microsoft.Maui", "Thickness"), parameterTypes: args.Select(a => ("mscorlib", "System", "Double")).ToArray()));
}
}
} |