Max Katz
3 years ago
5 changed files with 261 additions and 102 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 OnPlatformTransformer : 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("OnPlatform") |
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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 OnPlatform 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("OnPlatform") |
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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("OnPlatform") |
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|| n.Type is XamlAstXmlTypeReference xmlRef && xmlRef.Name.StartsWith("OnPlatform")) |
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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 parentOnPlatformObject = context.ParentNodes().OfType<XamlAstObjectNode>()
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// .First(n => n.Type is XamlAstClrTypeReference clrRef && clrRef.Type.Name.StartsWith("OnPlatform")
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// || n.Type is XamlAstXmlTypeReference xmlRef && xmlRef.Name.StartsWith("OnPlatform"));
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// parentOnPlatformObject.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, parentOnPlatformObject.Type, platform.Trim(),
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// parentOnPlatformObject.Type), content);
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// parentOnPlatformObject.Children.Add(propertyNode);
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// }
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//
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// return parentOnPlatformObject.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 OnPlatformGenericTypeVisitor(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 OnPlatformGenericTypeVisitor : IXamlAstVisitor |
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{ |
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private readonly XamlAstXmlTypeReference _type; |
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public OnPlatformGenericTypeVisitor(IXamlAstTypeReference type) |
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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: "OnPlatform" } 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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public void Pop() |
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{ |
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} |
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} |
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} |
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@ -1 +1 @@ |
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Subproject commit c1c0594ec2c35b08988183b1a5b3e34dfa19179d |
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Subproject commit 2c3b53a3db61018db620418fab509ba1d168ff24 |
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@ -1,97 +1,74 @@ |
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#nullable enable |
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using System; |
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using System.Globalization; |
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using System.Reflection; |
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using Avalonia.Data.Converters; |
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using System.Collections.Generic; |
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using System.Linq; |
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using Avalonia.Metadata; |
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using Avalonia.Platform; |
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using Avalonia.Styling; |
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namespace Avalonia.Markup.Xaml.MarkupExtensions; |
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public class OnPlatformExtension |
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public class On |
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{ |
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private static readonly object s_unset = new object(); |
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public string Platform { get; set; } = "Unknown"; |
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[Content] |
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public object? Content { get; set; } |
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} |
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public class OnPlatformExtension<TReturn> : IAddChild<On> |
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{ |
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private readonly Dictionary<string, TReturn?> _values = new(); |
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public OnPlatformExtension() |
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{ |
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} |
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public OnPlatformExtension(object defaultValue) |
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public OnPlatformExtension(TReturn defaultValue) |
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{ |
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Default = defaultValue; |
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} |
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[Content] |
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public object? Default { get; set; } = s_unset; |
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public object? Windows { get; set; } = s_unset; |
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public object? macOS { get; set; } = s_unset; |
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public object? Linux { get; set; } = s_unset; |
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public object? Android { get; set; } = s_unset; |
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public object? iOS { get; set; } = s_unset; |
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public object? Browser { get; set; } = s_unset; |
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public IValueConverter? Converter { get; set; } |
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public object? ConverterParameter { get; set; } |
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public TReturn? Default { get => _values.TryGetValue(nameof(Default), out var value) ? value : default; set { _values[nameof(Default)] = value; } } |
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public TReturn? Windows { get => _values.TryGetValue(nameof(Windows), out var value) ? value : default; set { _values[nameof(Windows)] = value; } } |
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public TReturn? macOS { get => _values.TryGetValue(nameof(macOS), out var value) ? value : default; set { _values[nameof(macOS)] = value; } } |
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public TReturn? Linux { get => _values.TryGetValue(nameof(Linux), out var value) ? value : default; set { _values[nameof(Linux)] = value; } } |
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public TReturn? Android { get => _values.TryGetValue(nameof(Android), out var value) ? value : default; set { _values[nameof(Android)] = value; } } |
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public TReturn? iOS { get => _values.TryGetValue(nameof(iOS), out var value) ? value : default; set { _values[nameof(iOS)] = value; } } |
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public TReturn? Browser { get => _values.TryGetValue(nameof(Browser), out var value) ? value : default; set { _values[nameof(Browser)] = value; } } |
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public object? ProvideValue(IServiceProvider serviceProvider) |
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public object? ProvideValue() |
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{ |
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if (Default == s_unset |
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&& Windows == s_unset |
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&& macOS == s_unset |
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&& Linux == s_unset |
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&& Android == s_unset |
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&& iOS == s_unset |
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&& Browser == s_unset) |
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if (!_values.Any()) |
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{ |
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throw new InvalidOperationException("OnPlatformExtension requires a value to be specified for at least one platform or Default."); |
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} |
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var provideTarget = serviceProvider.GetService<IProvideValueTarget>(); |
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var targetType = provideTarget.TargetProperty switch |
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{ |
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AvaloniaProperty ap => ap.PropertyType, |
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PropertyInfo pi => pi.PropertyType, |
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_ => null, |
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}; |
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if (provideTarget.TargetObject is Setter setter) |
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{ |
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targetType = setter.Property?.PropertyType ?? targetType; |
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} |
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if (!TryGetValueForPlatform(out var value)) |
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{ |
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return AvaloniaProperty.UnsetValue; |
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} |
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if (targetType is null) |
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{ |
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return value; |
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} |
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var converter = Converter ?? DefaultValueConverter.Instance; |
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return converter.Convert(value, targetType, ConverterParameter, CultureInfo.CurrentUICulture); |
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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 bool TryGetValueForPlatform(out object? value) |
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private (TReturn? value, bool hasValue) TryGetValueForPlatform() |
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{ |
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var runtimeInfo = AvaloniaLocator.Current.GetRequiredService<IRuntimePlatform>().GetRuntimeInfo(); |
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value = runtimeInfo.OperatingSystem switch |
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return runtimeInfo.OperatingSystem switch |
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{ |
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OperatingSystemType.WinNT when Windows != s_unset => Windows, |
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OperatingSystemType.Linux when Linux != s_unset => Linux, |
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OperatingSystemType.OSX when macOS != s_unset => macOS, |
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OperatingSystemType.Android when Android != s_unset => Android, |
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OperatingSystemType.iOS when iOS != s_unset => iOS, |
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OperatingSystemType.Browser when Browser != s_unset => Browser, |
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_ => Default |
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OperatingSystemType.WinNT => _values.TryGetValue(nameof(Windows), out var val) ? (val, true) : default, |
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OperatingSystemType.OSX => _values.TryGetValue(nameof(macOS), out var val) ? (val, true) : default, |
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OperatingSystemType.Linux => _values.TryGetValue(nameof(Linux), out var val) ? (val, true) : default, |
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OperatingSystemType.Android => _values.TryGetValue(nameof(Android), out var val) ? (val, true) : default, |
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OperatingSystemType.iOS => _values.TryGetValue(nameof(iOS), out var val) ? (val, true) : default, |
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OperatingSystemType.Browser => _values.TryGetValue(nameof(Browser), out var val) ? (val, true) : default, |
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_ => _values.TryGetValue(nameof(Default), out var val) ? (val, true) : default |
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}; |
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} |
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return value != s_unset; |
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public void AddChild(On child) |
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{ |
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foreach (var platform in child.Platform.Split(new [] { "," }, StringSplitOptions.RemoveEmptyEntries)) |
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{ |
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_values[platform.Trim()] = (TReturn?)child.Content; |
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} |
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} |
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} |
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