Dan Walmsley
4 years ago
6 changed files with 298 additions and 47 deletions
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using System; |
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using System.Linq; |
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using XamlX.Ast; |
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using XamlX.Transform; |
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using XamlX.Transform.Transformers; |
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using XamlX.TypeSystem; |
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namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions.Transformers; |
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internal class OnFormFactorTransformer : IXamlAstTransformer |
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{ |
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public IXamlAstNode Transform(AstTransformationContext context, IXamlAstNode node) |
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{ |
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if (node is XamlAstObjectNode xmlobj |
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&& xmlobj.Type is XamlAstXmlTypeReference xmlref |
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&& xmlref.Name.StartsWith("OnFormFactor") |
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&& !xmlref.GenericArguments.Any()) |
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{ |
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IXamlType propertyType = null; |
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if (context.ParentNodes().FirstOrDefault() is XamlAstXamlPropertyValueNode parentPropertyValueNode) |
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{ |
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var property = (XamlAstNamePropertyReference)parentPropertyValueNode.Property; |
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var declaringType = TypeReferenceResolver.ResolveType(context, (XamlAstXmlTypeReference)property.DeclaringType, context.StrictMode); |
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propertyType = declaringType.Type.GetAllProperties().First(p => p.Name == property.Name).PropertyType; |
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} |
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else if (context.ParentNodes().FirstOrDefault() is XamlAstObjectNode parentNode) |
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{ |
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var parentType = parentNode.Type is XamlAstClrTypeReference clrType |
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? clrType.Type |
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: TypeReferenceResolver.ResolveType(context, (XamlAstXmlTypeReference)parentNode.Type, context.StrictMode).Type; |
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var contentProperty = context.Configuration.FindContentProperty(parentType); |
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propertyType = contentProperty.PropertyType; |
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} |
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if (propertyType is null) |
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{ |
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throw new InvalidOperationException("Unable to find OnFormFactor property type"); |
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} |
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xmlobj.Type = TypeReferenceResolver.ResolveType(context, xmlref.XmlNamespace, xmlref.Name, |
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xmlref.IsMarkupExtension, new[] { new XamlAstClrTypeReference(xmlref, propertyType, false) }, |
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xmlref, context.StrictMode); |
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} |
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if (node is XamlAstNamePropertyReference xmlprop |
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&& xmlprop.DeclaringType is XamlAstXmlTypeReference propxmlref |
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&& propxmlref.Name.StartsWith("OnFormFactor") |
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&& !propxmlref.GenericArguments.Any()) |
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{ |
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var expectedType = context.ParentNodes().OfType<XamlAstObjectNode>() |
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.First(n => n.Type is XamlAstClrTypeReference clrRef && clrRef.Type.Name.StartsWith("OnFormFactor") |
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|| n.Type is XamlAstXmlTypeReference xmlRef && xmlRef.Name.StartsWith("OnFormFactor")) |
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.Type; |
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xmlprop.DeclaringType = expectedType; |
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xmlprop.TargetType = expectedType; |
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} |
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// if (node is XamlAstObjectNode onobj
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// && onobj.Type is XamlAstXmlTypeReference onref
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// && onref.Name == "On")
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// {
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// var platformStr = (onobj.Children.OfType<XamlAstXamlPropertyValueNode>()
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// .FirstOrDefault(v => ((XamlAstNamePropertyReference)v.Property).Name == "Platform")?.Values.Single() as XamlAstTextNode)?
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// .Text;
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// if (string.IsNullOrWhiteSpace(platformStr))
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// {
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// throw new InvalidOperationException("On.Platform string must be set");
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// }
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// var content = onobj.Children.OfType<XamlAstObjectNode>().FirstOrDefault();
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// if (content is null)
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// {
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// throw new InvalidOperationException("On content object must be set");
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// }
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//
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// var parentOnFormFactorObject = context.ParentNodes().OfType<XamlAstObjectNode>()
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// .First(n => n.Type is XamlAstClrTypeReference clrRef && clrRef.Type.Name.StartsWith("OnFormFactor")
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// || n.Type is XamlAstXmlTypeReference xmlRef && xmlRef.Name.StartsWith("OnFormFactor"));
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// parentOnFormFactorObject.Children.Remove(onobj);
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// foreach (var platform in platformStr.Split(new [] { ',' }, StringSplitOptions.RemoveEmptyEntries))
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// {
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// var propertyNode = new XamlAstXamlPropertyValueNode(onobj,
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// new XamlAstNamePropertyReference(onobj, parentOnFormFactorObject.Type, platform.Trim(),
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// parentOnFormFactorObject.Type), content);
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// parentOnFormFactorObject.Children.Add(propertyNode);
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// }
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//
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// return parentOnFormFactorObject.Children.Last();
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// }
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// if (node is XamlAstXamlPropertyValueNode propNode)
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// {
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// var type = (propNode.Property as XamlAstNamePropertyReference).TargetType as XamlAstXmlTypeReference;
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//
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// propNode.VisitChildren(new OnFormFactorGenericTypeVisitor(type));
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//
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// return node;
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// }
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return node; |
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} |
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private class OnFormFactorGenericTypeVisitor : IXamlAstVisitor |
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{ |
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private readonly XamlAstXmlTypeReference _type; |
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public OnFormFactorGenericTypeVisitor(IXamlAstTypeReference type) |
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{ |
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|
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} |
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public IXamlAstNode Visit(IXamlAstNode node) |
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{ |
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if (node is XamlAstXmlTypeReference { Name: "OnFormFactor" } xmlref) |
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{ |
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xmlref.GenericArguments.Add(_type); |
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} |
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return node; |
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} |
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public void Push(IXamlAstNode node) |
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{ |
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} |
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|
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public void Pop() |
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{ |
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} |
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} |
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} |
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@ -0,0 +1,78 @@ |
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#nullable enable |
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using System; |
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using System.Collections.Generic; |
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using System.Linq; |
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using Avalonia.Platform; |
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namespace Avalonia.Markup.Xaml.MarkupExtensions; |
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public class OnFormFactorExtension<TReturn> |
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{ |
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private readonly Dictionary<string, TReturn?> _values = new(); |
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public OnFormFactorExtension(TReturn defaultValue) |
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{ |
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Default = defaultValue; |
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} |
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public TReturn? Default |
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{ |
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get => _values.TryGetValue(nameof(Default), out var value) ? value : default; |
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set { _values[nameof(Default)] = value; } |
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} |
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public TReturn? Desktop |
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{ |
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get => _values.TryGetValue(nameof(Desktop), out var value) ? value : default; |
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set { _values[nameof(Desktop)] = value; } |
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} |
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public TReturn? Mobile |
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{ |
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get => _values.TryGetValue(nameof(Mobile), out var value) ? value : default; |
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set { _values[nameof(Mobile)] = value; } |
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} |
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public object? ProvideValue() |
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{ |
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if (!_values.Any()) |
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{ |
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throw new InvalidOperationException( |
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"OnPlatformExtension requires a value to be specified for at least one platform or Default."); |
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} |
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var (value, hasValue) = TryGetValueForPlatform(); |
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return !hasValue ? AvaloniaProperty.UnsetValue : value; |
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} |
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private (object? value, bool hasValue) TryGetValueForPlatform() |
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{ |
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var runtimeInfo = AvaloniaLocator.Current.GetRequiredService<IRuntimePlatform>().GetRuntimeInfo(); |
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TReturn val; |
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if (runtimeInfo.IsDesktop) |
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{ |
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if (_values.TryGetValue(nameof(Desktop), out val)) |
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{ |
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return (val, true); |
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} |
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} |
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if (runtimeInfo.IsMobile) |
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{ |
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if (_values.TryGetValue(nameof(Mobile), out val)) |
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{ |
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return (val, true); |
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} |
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} |
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if (_values.TryGetValue(nameof(Default), out val)) |
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{ |
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return (val, true); |
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} |
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return default; |
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} |
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} |
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