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Add Cascading flag to Parameter (#1564) 

... so that components that pass through an arbitrary set of parameters can choose to filter out cascading ones if they want.
This commit is contained in:
Steve Sanderson 2018-10-18 09:37:46 +01:00 committed by GitHub
parent dd807a6d70
commit 4a6f471d12
3 changed files with 19 additions and 11 deletions
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9
src/Microsoft.AspNetCore.Blazor/Components/Parameter.cs
View File

@ -19,10 +19,17 @@ namespace Microsoft.AspNetCore.Blazor.Components
/// </summary>
public object Value { get; }
internal Parameter(string name, object value)
/// <summary>
/// Gets a value to indicate whether the parameter is cascading, meaning that it
/// was supplied by a <see cref="CascadingValue{T}"/>.
/// </summary>
public bool Cascading { get; }
internal Parameter(string name, object value, bool cascading)
{
Name = name;
Value = value;
Cascading = cascading;
}
}
}

4
src/Microsoft.AspNetCore.Blazor/Components/ParameterEnumerator.cs
View File

@ -89,7 +89,7 @@ namespace Microsoft.AspNetCore.Blazor.Components
_currentIndex = nextIndex;
ref var frame = ref _frames[_currentIndex];
_current = new Parameter(frame.AttributeName, frame.AttributeValue);
_current = new Parameter(frame.AttributeName, frame.AttributeValue, false);
return true;
}
@ -124,7 +124,7 @@ namespace Microsoft.AspNetCore.Blazor.Components
_currentIndex = nextIndex;
var state = _cascadingParameters[_currentIndex];
_current = new Parameter(state.LocalValueName, state.ValueSupplier.CurrentValue);
_current = new Parameter(state.LocalValueName, state.ValueSupplier.CurrentValue, true);
return true;
}
else

17
test/Microsoft.AspNetCore.Blazor.Test/ParameterCollectionTest.cs
View File

@ -60,8 +60,8 @@ namespace Microsoft.AspNetCore.Blazor.Test
// Assert
Assert.Collection(ToEnumerable(parameterCollection),
AssertParameter("attribute 1", attribute1Value),
AssertParameter("attribute 2", attribute2Value));
AssertParameter("attribute 1", attribute1Value, false),
AssertParameter("attribute 2", attribute2Value, false));
}
[Fact]
@ -82,8 +82,8 @@ namespace Microsoft.AspNetCore.Blazor.Test
// Assert
Assert.Collection(ToEnumerable(parameterCollection),
AssertParameter("attribute 1", attribute1Value),
AssertParameter("attribute 2", attribute2Value));
AssertParameter("attribute 1", attribute1Value, false),
AssertParameter("attribute 2", attribute2Value, false));
}
[Fact]
@ -105,9 +105,9 @@ namespace Microsoft.AspNetCore.Blazor.Test
// Assert
Assert.Collection(ToEnumerable(parameterCollection),
AssertParameter("attribute 1", attribute1Value),
AssertParameter("attribute 2", attribute2Value),
AssertParameter("attribute 3", attribute3Value));
AssertParameter("attribute 1", attribute1Value, false),
AssertParameter("attribute 2", attribute2Value, true),
AssertParameter("attribute 3", attribute3Value, true));
}
[Fact]
@ -291,12 +291,13 @@ namespace Microsoft.AspNetCore.Blazor.Test
Assert.Same(myEntryValue, result);
}
private Action<Parameter> AssertParameter(string expectedName, object expectedValue)
private Action<Parameter> AssertParameter(string expectedName, object expectedValue, bool expectedIsCascading)
{
return parameter =>
{
Assert.Equal(expectedName, parameter.Name);
Assert.Same(expectedValue, parameter.Value);
Assert.Equal(expectedIsCascading, parameter.Cascading);
};
}