ili
5 years ago
12 changed files with 265 additions and 14 deletions
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using System; |
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using System.Collections.Generic; |
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using Avalonia.Data; |
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|
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namespace Avalonia |
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{ |
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internal static class ClassBindingManager |
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{ |
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private static readonly Dictionary<string, AvaloniaProperty> s_RegisteredProperties = |
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new Dictionary<string, AvaloniaProperty>(); |
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|
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public static IDisposable Bind(IStyledElement target, string className, IBinding source, object anchor) |
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{ |
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if (!s_RegisteredProperties.TryGetValue(className, out var prop)) |
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s_RegisteredProperties[className] = prop = RegisterClassProxyProperty(className); |
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return target.Bind(prop, source, anchor); |
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} |
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private static AvaloniaProperty RegisterClassProxyProperty(string className) |
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{ |
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var prop = AvaloniaProperty.Register<StyledElement, bool>("__AvaloniaReserved::Classes::" + className); |
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prop.Changed.Subscribe(args => |
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{ |
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var classes = ((IStyledElement)args.Sender).Classes; |
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classes.Set(className, args.NewValue.GetValueOrDefault()); |
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}); |
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return prop; |
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} |
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} |
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} |
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@ -0,0 +1,11 @@ |
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using System; |
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using Avalonia.Data; |
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|
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namespace Avalonia |
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{ |
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public static class StyledElementExtensions |
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{ |
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public static IDisposable BindClass(this IStyledElement target, string className, IBinding source, object anchor) => |
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ClassBindingManager.Bind(target, className, source, anchor); |
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} |
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} |
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@ -0,0 +1,97 @@ |
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using System.Collections.Generic; |
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using XamlX.Ast; |
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using XamlX.Emit; |
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using XamlX.IL; |
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using XamlX.Transform; |
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using XamlX.TypeSystem; |
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|
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namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions.Transformers |
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{ |
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class AvaloniaXamlIlResolveClassesPropertiesTransformer : 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 XamlAstNamePropertyReference prop |
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&& prop.TargetType is XamlAstClrTypeReference targetRef |
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&& prop.DeclaringType is XamlAstClrTypeReference declaringRef) |
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{ |
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var types = context.GetAvaloniaTypes(); |
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if (types.StyledElement.IsAssignableFrom(targetRef.Type) |
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&& types.Classes.Equals(declaringRef.Type)) |
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{ |
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return new XamlAstClrProperty(node, "class:" + prop.Name, types.Classes, |
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null) |
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{ |
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Setters = { new ClassValueSetter(types, prop.Name), new ClassBindingSetter(types, prop.Name) } |
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}; |
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} |
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} |
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return node; |
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} |
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|
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|
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class ClassValueSetter : IXamlEmitablePropertySetter<IXamlILEmitter> |
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{ |
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private readonly AvaloniaXamlIlWellKnownTypes _types; |
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private readonly string _className; |
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public ClassValueSetter(AvaloniaXamlIlWellKnownTypes types, string className) |
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{ |
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_types = types; |
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_className = className; |
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Parameters = new[] { types.XamlIlTypes.Boolean }; |
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} |
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|
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public void Emit(IXamlILEmitter emitter) |
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{ |
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using (var value = emitter.LocalsPool.GetLocal(_types.XamlIlTypes.Boolean)) |
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{ |
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emitter |
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.Stloc(value.Local) |
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.EmitCall(_types.StyledElementClassesProperty.Getter) |
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.Ldstr(_className) |
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.Ldloc(value.Local) |
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.EmitCall(_types.Classes.GetMethod(new FindMethodMethodSignature("Set", |
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_types.XamlIlTypes.Void, _types.XamlIlTypes.String, _types.XamlIlTypes.Boolean))); |
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} |
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} |
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public IXamlType TargetType => _types.StyledElement; |
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public PropertySetterBinderParameters BinderParameters { get; } = |
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new PropertySetterBinderParameters { AllowXNull = false }; |
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public IReadOnlyList<IXamlType> Parameters { get; } |
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} |
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|
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class ClassBindingSetter : IXamlEmitablePropertySetter<IXamlILEmitter> |
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{ |
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private readonly AvaloniaXamlIlWellKnownTypes _types; |
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private readonly string _className; |
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public ClassBindingSetter(AvaloniaXamlIlWellKnownTypes types, string className) |
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{ |
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_types = types; |
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_className = className; |
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Parameters = new[] {types.IBinding}; |
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} |
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|
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public void Emit(IXamlILEmitter emitter) |
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{ |
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using (var bloc = emitter.LocalsPool.GetLocal(_types.IBinding)) |
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emitter |
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.Stloc(bloc.Local) |
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.Ldstr(_className) |
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.Ldloc(bloc.Local) |
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// TODO: provide anchor?
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.Ldnull(); |
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emitter.EmitCall(_types.ClassesBindMethod, true); |
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} |
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public IXamlType TargetType => _types.StyledElement; |
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public PropertySetterBinderParameters BinderParameters { get; } = |
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new PropertySetterBinderParameters { AllowXNull = false }; |
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public IReadOnlyList<IXamlType> Parameters { get; } |
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} |
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} |
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} |
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@ -0,0 +1,40 @@ |
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using XamlX.Ast; |
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using XamlX.Transform; |
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|
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namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions.Transformers |
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{ |
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class AvaloniaXamlIlReorderClassesPropertiesTransformer : 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 obj) |
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{ |
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IXamlAstNode classesNode = null; |
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IXamlAstNode firstSingleClassNode = null; |
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var types = context.GetAvaloniaTypes(); |
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foreach (var child in obj.Children) |
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{ |
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if (child is XamlAstXamlPropertyValueNode propValue |
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&& propValue.Property is XamlAstClrProperty prop) |
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{ |
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if (prop.DeclaringType.Equals(types.Classes)) |
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{ |
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if (firstSingleClassNode == null) |
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firstSingleClassNode = child; |
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} |
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else if (prop.Name == "Classes" && prop.DeclaringType.Equals(types.StyledElement)) |
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classesNode = child; |
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} |
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} |
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if (classesNode != null && firstSingleClassNode != null) |
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{ |
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obj.Children.Remove(classesNode); |
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obj.Children.Insert(obj.Children.IndexOf(firstSingleClassNode), classesNode); |
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} |
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} |
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return node; |
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} |
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} |
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} |
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