Lubomir Tetak
5 years ago
committed by
GitHub
GitHub
21 changed files with 1542 additions and 21 deletions
@ -0,0 +1,26 @@ |
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#nullable enable |
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using System; |
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|
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namespace Avalonia.LogicalTree |
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{ |
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/// <summary>
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/// Event args for <see cref="IChildIndexProvider.ChildIndexChanged"/> event.
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/// </summary>
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public class ChildIndexChangedEventArgs : EventArgs |
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{ |
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public ChildIndexChangedEventArgs() |
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{ |
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} |
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public ChildIndexChangedEventArgs(ILogical child) |
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{ |
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Child = child; |
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} |
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/// <summary>
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/// Logical child which index was changed.
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/// If null, all children should be reset.
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/// </summary>
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public ILogical? Child { get; } |
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} |
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} |
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@ -0,0 +1,32 @@ |
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#nullable enable |
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using System; |
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namespace Avalonia.LogicalTree |
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{ |
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/// <summary>
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/// Child's index and total count information provider used by list-controls (ListBox, StackPanel, etc.)
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/// </summary>
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/// <remarks>
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/// Used by nth-child and nth-last-child selectors.
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/// </remarks>
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public interface IChildIndexProvider |
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{ |
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/// <summary>
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/// Gets child's actual index in order of the original source.
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/// </summary>
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/// <param name="child">Logical child.</param>
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/// <returns>Index or -1 if child was not found.</returns>
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int GetChildIndex(ILogical child); |
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/// <summary>
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/// Total children count or null if source is infinite.
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/// Some Avalonia features might not work if <see cref="TryGetTotalCount"/> returns false, for instance: nth-last-child selector.
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/// </summary>
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bool TryGetTotalCount(out int count); |
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/// <summary>
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/// Notifies subscriber when child's index or total count was changed.
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/// </summary>
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event EventHandler<ChildIndexChangedEventArgs>? ChildIndexChanged; |
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} |
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} |
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@ -0,0 +1,56 @@ |
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#nullable enable |
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using Avalonia.LogicalTree; |
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namespace Avalonia.Styling.Activators |
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{ |
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/// <summary>
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/// An <see cref="IStyleActivator"/> which is active when control's index was changed.
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/// </summary>
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internal sealed class NthChildActivator : StyleActivatorBase |
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{ |
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private readonly ILogical _control; |
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private readonly IChildIndexProvider _provider; |
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private readonly int _step; |
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private readonly int _offset; |
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private readonly bool _reversed; |
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public NthChildActivator( |
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ILogical control, |
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IChildIndexProvider provider, |
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int step, int offset, bool reversed) |
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{ |
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_control = control; |
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_provider = provider; |
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_step = step; |
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_offset = offset; |
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_reversed = reversed; |
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} |
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protected override void Initialize() |
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{ |
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PublishNext(IsMatching()); |
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_provider.ChildIndexChanged += ChildIndexChanged; |
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} |
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protected override void Deinitialize() |
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{ |
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_provider.ChildIndexChanged -= ChildIndexChanged; |
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} |
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private void ChildIndexChanged(object sender, ChildIndexChangedEventArgs e) |
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{ |
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// Run matching again if:
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// 1. Selector is reversed, so other item insertion/deletion might affect total count without changing subscribed item index.
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// 2. e.Child is null, when all children indeces were changed.
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// 3. Subscribed child index was changed.
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if (_reversed |
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|| e.Child is null |
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|| e.Child == _control) |
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{ |
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PublishNext(IsMatching()); |
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} |
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} |
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private bool IsMatching() => NthChildSelector.Evaluate(_control, _provider, _step, _offset, _reversed).IsMatch; |
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} |
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} |
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@ -0,0 +1,145 @@ |
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#nullable enable |
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using System; |
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using System.Text; |
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using Avalonia.LogicalTree; |
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using Avalonia.Styling.Activators; |
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namespace Avalonia.Styling |
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{ |
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/// <summary>
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/// The :nth-child() pseudo-class matches elements based on their position in a group of siblings.
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/// </summary>
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/// <remarks>
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/// Element indices are 1-based.
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/// </remarks>
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public class NthChildSelector : Selector |
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{ |
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private const string NthChildSelectorName = "nth-child"; |
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private const string NthLastChildSelectorName = "nth-last-child"; |
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private readonly Selector? _previous; |
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private readonly bool _reversed; |
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internal protected NthChildSelector(Selector? previous, int step, int offset, bool reversed) |
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{ |
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_previous = previous; |
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Step = step; |
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Offset = offset; |
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_reversed = reversed; |
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} |
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/// <summary>
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/// Creates an instance of <see cref="NthChildSelector"/>
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/// </summary>
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/// <param name="previous">Previous selector.</param>
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/// <param name="step">Position step.</param>
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/// <param name="offset">Initial index offset.</param>
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public NthChildSelector(Selector? previous, int step, int offset) |
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: this(previous, step, offset, false) |
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{ |
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} |
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public override bool InTemplate => _previous?.InTemplate ?? false; |
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public override bool IsCombinator => false; |
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public override Type? TargetType => _previous?.TargetType; |
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public int Step { get; } |
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public int Offset { get; } |
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protected override SelectorMatch Evaluate(IStyleable control, bool subscribe) |
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{ |
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if (!(control is ILogical logical)) |
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{ |
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return SelectorMatch.NeverThisType; |
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} |
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var controlParent = logical.LogicalParent; |
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if (controlParent is IChildIndexProvider childIndexProvider) |
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{ |
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return subscribe |
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? new SelectorMatch(new NthChildActivator(logical, childIndexProvider, Step, Offset, _reversed)) |
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: Evaluate(logical, childIndexProvider, Step, Offset, _reversed); |
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} |
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else |
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{ |
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return SelectorMatch.NeverThisInstance; |
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} |
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} |
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internal static SelectorMatch Evaluate( |
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ILogical logical, IChildIndexProvider childIndexProvider, |
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int step, int offset, bool reversed) |
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{ |
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var index = childIndexProvider.GetChildIndex(logical); |
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if (index < 0) |
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{ |
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return SelectorMatch.NeverThisInstance; |
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} |
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if (reversed) |
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{ |
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if (childIndexProvider.TryGetTotalCount(out var totalCountValue)) |
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{ |
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index = totalCountValue - index; |
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} |
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else |
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{ |
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return SelectorMatch.NeverThisInstance; |
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} |
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} |
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else |
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{ |
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// nth child index is 1-based
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index += 1; |
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} |
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var n = Math.Sign(step); |
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var diff = index - offset; |
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var match = diff == 0 || (Math.Sign(diff) == n && diff % step == 0); |
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return match ? SelectorMatch.AlwaysThisInstance : SelectorMatch.NeverThisInstance; |
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} |
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protected override Selector? MovePrevious() => _previous; |
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public override string ToString() |
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{ |
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var expectedCapacity = NthLastChildSelectorName.Length + 8; |
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var stringBuilder = new StringBuilder(_previous?.ToString(), expectedCapacity); |
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stringBuilder.Append(':'); |
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stringBuilder.Append(_reversed ? NthLastChildSelectorName : NthChildSelectorName); |
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stringBuilder.Append('('); |
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var hasStep = false; |
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if (Step != 0) |
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{ |
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hasStep = true; |
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stringBuilder.Append(Step); |
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stringBuilder.Append('n'); |
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} |
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if (Offset > 0) |
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{ |
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if (hasStep) |
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{ |
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stringBuilder.Append('+'); |
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} |
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stringBuilder.Append(Offset); |
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} |
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else if (Offset < 0) |
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{ |
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stringBuilder.Append('-'); |
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stringBuilder.Append(-Offset); |
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} |
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stringBuilder.Append(')'); |
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return stringBuilder.ToString(); |
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} |
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} |
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} |
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@ -0,0 +1,23 @@ |
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#nullable enable |
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namespace Avalonia.Styling |
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{ |
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/// <summary>
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/// The :nth-child() pseudo-class matches elements based on their position among a group of siblings, counting from the end.
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/// </summary>
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/// <remarks>
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/// Element indices are 1-based.
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/// </remarks>
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public class NthLastChildSelector : NthChildSelector |
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{ |
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/// <summary>
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/// Creates an instance of <see cref="NthLastChildSelector"/>
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/// </summary>
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/// <param name="previous">Previous selector.</param>
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/// <param name="step">Position step.</param>
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/// <param name="offset">Initial index offset, counting from the end.</param>
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public NthLastChildSelector(Selector? previous, int step, int offset) : base(previous, step, offset, true) |
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{ |
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} |
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} |
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} |
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@ -0,0 +1,291 @@ |
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using System.Linq; |
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using System.Threading.Tasks; |
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using Avalonia.Controls; |
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using Xunit; |
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namespace Avalonia.Styling.UnitTests |
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{ |
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public class SelectorTests_NthChild |
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{ |
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[Theory] |
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[InlineData(2, 0, ":nth-child(2n)")] |
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[InlineData(2, 1, ":nth-child(2n+1)")] |
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[InlineData(1, 0, ":nth-child(1n)")] |
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[InlineData(4, -1, ":nth-child(4n-1)")] |
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[InlineData(0, 1, ":nth-child(1)")] |
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[InlineData(0, -1, ":nth-child(-1)")] |
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[InlineData(int.MaxValue, int.MinValue + 1, ":nth-child(2147483647n-2147483647)")] |
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public void Not_Selector_Should_Have_Correct_String_Representation(int step, int offset, string expected) |
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{ |
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var target = default(Selector).NthChild(step, offset); |
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Assert.Equal(expected, target.ToString()); |
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} |
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[Fact] |
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public async Task Nth_Child_Match_Control_In_Panel() |
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{ |
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Border b1, b2, b3, b4; |
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var panel = new StackPanel(); |
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panel.Children.AddRange(new[] |
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{ |
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b1 = new Border(), |
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b2 = new Border(), |
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b3 = new Border(), |
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b4 = new Border() |
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}); |
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var target = default(Selector).NthChild(2, 0); |
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Assert.False(await target.Match(b1).Activator!.Take(1)); |
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Assert.True(await target.Match(b2).Activator!.Take(1)); |
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Assert.False(await target.Match(b3).Activator!.Take(1)); |
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Assert.True(await target.Match(b4).Activator!.Take(1)); |
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} |
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[Fact] |
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public async Task Nth_Child_Match_Control_In_Panel_With_Offset() |
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{ |
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Border b1, b2, b3, b4; |
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var panel = new StackPanel(); |
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panel.Children.AddRange(new[] |
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{ |
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b1 = new Border(), |
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b2 = new Border(), |
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b3 = new Border(), |
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b4 = new Border() |
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}); |
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var target = default(Selector).NthChild(2, 1); |
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Assert.True(await target.Match(b1).Activator!.Take(1)); |
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Assert.False(await target.Match(b2).Activator!.Take(1)); |
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Assert.True(await target.Match(b3).Activator!.Take(1)); |
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Assert.False(await target.Match(b4).Activator!.Take(1)); |
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} |
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[Fact] |
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public async Task Nth_Child_Match_Control_In_Panel_With_Negative_Offset() |
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{ |
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Border b1, b2, b3, b4; |
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var panel = new StackPanel(); |
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panel.Children.AddRange(new[] |
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{ |
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b1 = new Border(), |
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b2 = new Border(), |
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b3 = new Border(), |
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b4 = new Border() |
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}); |
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var target = default(Selector).NthChild(4, -1); |
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Assert.False(await target.Match(b1).Activator!.Take(1)); |
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Assert.False(await target.Match(b2).Activator!.Take(1)); |
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Assert.True(await target.Match(b3).Activator!.Take(1)); |
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Assert.False(await target.Match(b4).Activator!.Take(1)); |
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} |
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[Fact] |
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public async Task Nth_Child_Match_Control_In_Panel_With_Singular_Step() |
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{ |
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Border b1, b2, b3, b4; |
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var panel = new StackPanel(); |
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panel.Children.AddRange(new[] |
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{ |
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b1 = new Border(), |
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b2 = new Border(), |
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b3 = new Border(), |
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b4 = new Border() |
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}); |
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var target = default(Selector).NthChild(1, 2); |
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Assert.False(await target.Match(b1).Activator!.Take(1)); |
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Assert.True(await target.Match(b2).Activator!.Take(1)); |
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Assert.True(await target.Match(b3).Activator!.Take(1)); |
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Assert.True(await target.Match(b4).Activator!.Take(1)); |
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} |
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[Fact] |
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public async Task Nth_Child_Match_Control_In_Panel_With_Singular_Step_With_Negative_Offset() |
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{ |
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Border b1, b2, b3, b4; |
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var panel = new StackPanel(); |
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panel.Children.AddRange(new[] |
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{ |
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b1 = new Border(), |
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b2 = new Border(), |
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b3 = new Border(), |
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b4 = new Border() |
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}); |
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var target = default(Selector).NthChild(1, -1); |
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Assert.True(await target.Match(b1).Activator!.Take(1)); |
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Assert.True(await target.Match(b2).Activator!.Take(1)); |
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Assert.True(await target.Match(b3).Activator!.Take(1)); |
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Assert.True(await target.Match(b4).Activator!.Take(1)); |
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} |
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[Fact] |
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public async Task Nth_Child_Match_Control_In_Panel_With_Zero_Step_With_Offset() |
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{ |
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Border b1, b2, b3, b4; |
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var panel = new StackPanel(); |
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panel.Children.AddRange(new[] |
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{ |
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b1 = new Border(), |
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b2 = new Border(), |
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b3 = new Border(), |
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b4 = new Border() |
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}); |
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var target = default(Selector).NthChild(0, 2); |
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Assert.False(await target.Match(b1).Activator!.Take(1)); |
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Assert.True(await target.Match(b2).Activator!.Take(1)); |
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Assert.False(await target.Match(b3).Activator!.Take(1)); |
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Assert.False(await target.Match(b4).Activator!.Take(1)); |
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} |
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[Fact] |
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public async Task Nth_Child_Doesnt_Match_Control_In_Panel_With_Zero_Step_With_Negative_Offset() |
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{ |
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Border b1, b2, b3, b4; |
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var panel = new StackPanel(); |
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panel.Children.AddRange(new[] |
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{ |
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b1 = new Border(), |
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b2 = new Border(), |
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b3 = new Border(), |
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b4 = new Border() |
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}); |
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var target = default(Selector).NthChild(0, -2); |
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Assert.False(await target.Match(b1).Activator!.Take(1)); |
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Assert.False(await target.Match(b2).Activator!.Take(1)); |
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Assert.False(await target.Match(b3).Activator!.Take(1)); |
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Assert.False(await target.Match(b4).Activator!.Take(1)); |
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} |
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[Fact] |
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public async Task Nth_Child_Match_Control_In_Panel_With_Previous_Selector() |
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{ |
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Border b1, b2; |
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Button b3, b4; |
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var panel = new StackPanel(); |
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panel.Children.AddRange(new Control[] |
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{ |
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b1 = new Border(), |
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b2 = new Border(), |
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b3 = new Button(), |
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b4 = new Button() |
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}); |
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var previous = default(Selector).OfType<Border>(); |
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var target = previous.NthChild(2, 0); |
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Assert.False(await target.Match(b1).Activator!.Take(1)); |
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Assert.True(await target.Match(b2).Activator!.Take(1)); |
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Assert.Null(target.Match(b3).Activator); |
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Assert.Equal(SelectorMatchResult.NeverThisType, target.Match(b3).Result); |
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Assert.Null(target.Match(b4).Activator); |
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Assert.Equal(SelectorMatchResult.NeverThisType, target.Match(b4).Result); |
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} |
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[Fact] |
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public void Nth_Child_Doesnt_Match_Control_Out_Of_Panel_Parent() |
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{ |
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Border b1; |
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var contentControl = new ContentControl(); |
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contentControl.Content = b1 = new Border(); |
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var target = default(Selector).NthChild(1, 0); |
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Assert.Equal(SelectorMatch.NeverThisInstance, target.Match(b1)); |
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} |
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[Theory] // http://nthmaster.com/
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[InlineData(+0, 8, false, false, false, false, false, false, false, true , false, false, false)] |
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[InlineData(+1, 6, false, false, false, false, false, true , true , true , true , true , true )] |
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[InlineData(-1, 9, true , true , true , true , true , true , true , true , true , false, false)] |
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public async Task Nth_Child_Master_Com_Test_Sigle_Selector( |
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int step, int offset, params bool[] items) |
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{ |
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var panel = new StackPanel(); |
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panel.Children.AddRange(items.Select(_ => new Border())); |
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var previous = default(Selector).OfType<Border>(); |
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var target = previous.NthChild(step, offset); |
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var results = new bool[items.Length]; |
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for (int index = 0; index < items.Length; index++) |
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{ |
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var border = panel.Children[index]; |
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results[index] = await target.Match(border).Activator!.Take(1); |
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} |
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Assert.Equal(items, results); |
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} |
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[Theory] // http://nthmaster.com/
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[InlineData(+1, 4, -1, 8, false, false, false, true , true , true , true , true , false, false, false)] |
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[InlineData(+3, 1, +2, 0, false, false, false, true , false, false, false, false, false, true , false)] |
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public async Task Nth_Child_Master_Com_Test_Double_Selector( |
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int step1, int offset1, int step2, int offset2, params bool[] items) |
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{ |
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var panel = new StackPanel(); |
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panel.Children.AddRange(items.Select(_ => new Border())); |
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var previous = default(Selector).OfType<Border>(); |
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var middle = previous.NthChild(step1, offset1); |
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var target = middle.NthChild(step2, offset2); |
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var results = new bool[items.Length]; |
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for (int index = 0; index < items.Length; index++) |
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{ |
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var border = panel.Children[index]; |
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results[index] = await target.Match(border).Activator!.Take(1); |
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} |
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Assert.Equal(items, results); |
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} |
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[Theory] // http://nthmaster.com/
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[InlineData(+1, 2, 2, 1, -1, 9, false, false, true , false, true , false, true , false, true , false, false)] |
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public async Task Nth_Child_Master_Com_Test_Triple_Selector( |
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int step1, int offset1, int step2, int offset2, int step3, int offset3, params bool[] items) |
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{ |
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var panel = new StackPanel(); |
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panel.Children.AddRange(items.Select(_ => new Border())); |
|||
|
|||
var previous = default(Selector).OfType<Border>(); |
|||
var middle1 = previous.NthChild(step1, offset1); |
|||
var middle2 = middle1.NthChild(step2, offset2); |
|||
var target = middle2.NthChild(step3, offset3); |
|||
|
|||
var results = new bool[items.Length]; |
|||
for (int index = 0; index < items.Length; index++) |
|||
{ |
|||
var border = panel.Children[index]; |
|||
results[index] = await target.Match(border).Activator!.Take(1); |
|||
} |
|||
|
|||
Assert.Equal(items, results); |
|||
} |
|||
|
|||
[Fact] |
|||
public void Returns_Correct_TargetType() |
|||
{ |
|||
var target = new NthChildSelector(default(Selector).OfType<Control1>(), 1, 0); |
|||
|
|||
Assert.Equal(typeof(Control1), target.TargetType); |
|||
} |
|||
|
|||
public class Control1 : Control |
|||
{ |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,220 @@ |
|||
using System.Threading.Tasks; |
|||
using Avalonia.Controls; |
|||
using Xunit; |
|||
|
|||
namespace Avalonia.Styling.UnitTests |
|||
{ |
|||
public class SelectorTests_NthLastChild |
|||
{ |
|||
[Theory] |
|||
[InlineData(2, 0, ":nth-last-child(2n)")] |
|||
[InlineData(2, 1, ":nth-last-child(2n+1)")] |
|||
[InlineData(1, 0, ":nth-last-child(1n)")] |
|||
[InlineData(4, -1, ":nth-last-child(4n-1)")] |
|||
[InlineData(0, 1, ":nth-last-child(1)")] |
|||
[InlineData(0, -1, ":nth-last-child(-1)")] |
|||
[InlineData(int.MaxValue, int.MinValue + 1, ":nth-last-child(2147483647n-2147483647)")] |
|||
public void Not_Selector_Should_Have_Correct_String_Representation(int step, int offset, string expected) |
|||
{ |
|||
var target = default(Selector).NthLastChild(step, offset); |
|||
|
|||
Assert.Equal(expected, target.ToString()); |
|||
} |
|||
|
|||
[Fact] |
|||
public async Task Nth_Child_Match_Control_In_Panel() |
|||
{ |
|||
Border b1, b2, b3, b4; |
|||
var panel = new StackPanel(); |
|||
panel.Children.AddRange(new[] |
|||
{ |
|||
b1 = new Border(), |
|||
b2 = new Border(), |
|||
b3 = new Border(), |
|||
b4 = new Border() |
|||
}); |
|||
|
|||
var target = default(Selector).NthLastChild(2, 0); |
|||
|
|||
Assert.True(await target.Match(b1).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b2).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b3).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b4).Activator!.Take(1)); |
|||
} |
|||
|
|||
[Fact] |
|||
public async Task Nth_Child_Match_Control_In_Panel_With_Offset() |
|||
{ |
|||
Border b1, b2, b3, b4; |
|||
var panel = new StackPanel(); |
|||
panel.Children.AddRange(new[] |
|||
{ |
|||
b1 = new Border(), |
|||
b2 = new Border(), |
|||
b3 = new Border(), |
|||
b4 = new Border() |
|||
}); |
|||
|
|||
var target = default(Selector).NthLastChild(2, 1); |
|||
|
|||
Assert.False(await target.Match(b1).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b2).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b3).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b4).Activator!.Take(1)); |
|||
} |
|||
|
|||
[Fact] |
|||
public async Task Nth_Child_Match_Control_In_Panel_With_Negative_Offset() |
|||
{ |
|||
Border b1, b2, b3, b4; |
|||
var panel = new StackPanel(); |
|||
panel.Children.AddRange(new[] |
|||
{ |
|||
b1 = new Border(), |
|||
b2 = new Border(), |
|||
b3 = new Border(), |
|||
b4 = new Border() |
|||
}); |
|||
|
|||
var target = default(Selector).NthLastChild(4, -1); |
|||
|
|||
Assert.False(await target.Match(b1).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b2).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b3).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b4).Activator!.Take(1)); |
|||
} |
|||
|
|||
[Fact] |
|||
public async Task Nth_Child_Match_Control_In_Panel_With_Singular_Step() |
|||
{ |
|||
Border b1, b2, b3, b4; |
|||
var panel = new StackPanel(); |
|||
panel.Children.AddRange(new[] |
|||
{ |
|||
b1 = new Border(), |
|||
b2 = new Border(), |
|||
b3 = new Border(), |
|||
b4 = new Border() |
|||
}); |
|||
|
|||
var target = default(Selector).NthLastChild(1, 2); |
|||
|
|||
Assert.True(await target.Match(b1).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b2).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b3).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b4).Activator!.Take(1)); |
|||
} |
|||
|
|||
[Fact] |
|||
public async Task Nth_Child_Match_Control_In_Panel_With_Singular_Step_With_Negative_Offset() |
|||
{ |
|||
Border b1, b2, b3, b4; |
|||
var panel = new StackPanel(); |
|||
panel.Children.AddRange(new[] |
|||
{ |
|||
b1 = new Border(), |
|||
b2 = new Border(), |
|||
b3 = new Border(), |
|||
b4 = new Border() |
|||
}); |
|||
|
|||
var target = default(Selector).NthLastChild(1, -2); |
|||
|
|||
Assert.True(await target.Match(b1).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b2).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b3).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b4).Activator!.Take(1)); |
|||
} |
|||
|
|||
[Fact] |
|||
public async Task Nth_Child_Match_Control_In_Panel_With_Zero_Step_With_Offset() |
|||
{ |
|||
Border b1, b2, b3, b4; |
|||
var panel = new StackPanel(); |
|||
panel.Children.AddRange(new[] |
|||
{ |
|||
b1 = new Border(), |
|||
b2 = new Border(), |
|||
b3 = new Border(), |
|||
b4 = new Border() |
|||
}); |
|||
|
|||
var target = default(Selector).NthLastChild(0, 2); |
|||
|
|||
Assert.False(await target.Match(b1).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b2).Activator!.Take(1)); |
|||
Assert.True(await target.Match(b3).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b4).Activator!.Take(1)); |
|||
} |
|||
|
|||
[Fact] |
|||
public async Task Nth_Child_Doesnt_Match_Control_In_Panel_With_Zero_Step_With_Negative_Offset() |
|||
{ |
|||
Border b1, b2, b3, b4; |
|||
var panel = new StackPanel(); |
|||
panel.Children.AddRange(new[] |
|||
{ |
|||
b1 = new Border(), |
|||
b2 = new Border(), |
|||
b3 = new Border(), |
|||
b4 = new Border() |
|||
}); |
|||
|
|||
var target = default(Selector).NthLastChild(0, -2); |
|||
|
|||
Assert.False(await target.Match(b1).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b2).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b3).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b4).Activator!.Take(1)); |
|||
} |
|||
|
|||
[Fact] |
|||
public async Task Nth_Child_Match_Control_In_Panel_With_Previous_Selector() |
|||
{ |
|||
Border b1, b2; |
|||
Button b3, b4; |
|||
var panel = new StackPanel(); |
|||
panel.Children.AddRange(new Control[] |
|||
{ |
|||
b1 = new Border(), |
|||
b2 = new Border(), |
|||
b3 = new Button(), |
|||
b4 = new Button() |
|||
}); |
|||
|
|||
var previous = default(Selector).OfType<Border>(); |
|||
var target = previous.NthLastChild(2, 0); |
|||
|
|||
Assert.True(await target.Match(b1).Activator!.Take(1)); |
|||
Assert.False(await target.Match(b2).Activator!.Take(1)); |
|||
Assert.Null(target.Match(b3).Activator); |
|||
Assert.Equal(SelectorMatchResult.NeverThisType, target.Match(b3).Result); |
|||
Assert.Null(target.Match(b4).Activator); |
|||
Assert.Equal(SelectorMatchResult.NeverThisType, target.Match(b4).Result); |
|||
} |
|||
|
|||
[Fact] |
|||
public void Nth_Child_Doesnt_Match_Control_Out_Of_Panel_Parent() |
|||
{ |
|||
Border b1; |
|||
var contentControl = new ContentControl(); |
|||
contentControl.Content = b1 = new Border(); |
|||
|
|||
var target = default(Selector).NthLastChild(1, 0); |
|||
|
|||
Assert.Equal(SelectorMatch.NeverThisInstance, target.Match(b1)); |
|||
} |
|||
|
|||
[Fact] |
|||
public void Returns_Correct_TargetType() |
|||
{ |
|||
var target = new NthLastChildSelector(default(Selector).OfType<Control1>(), 1, 0); |
|||
|
|||
Assert.Equal(typeof(Control1), target.TargetType); |
|||
} |
|||
|
|||
public class Control1 : Control |
|||
{ |
|||
} |
|||
} |
|||
} |
|||
Loading…
Reference in new issue