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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| // Copyright (c) The Perspex Project. All rights reserved. | ||
| // Licensed under the MIT license. See licence.md file in the project root for full license information. | ||
|
|
||
| using System; | ||
| using Perspex.LogicalTree; | ||
|
|
||
| namespace Perspex.Styling | ||
| { | ||
| internal class ChildSelector : Selector | ||
| { | ||
| private readonly Selector _parent; | ||
| private string _selectorString; | ||
|
|
||
| public ChildSelector(Selector parent) | ||
| { | ||
| if (parent == null) | ||
| { | ||
| throw new InvalidOperationException("Child selector must be preceeded by a selector."); | ||
| } | ||
|
|
||
| _parent = parent; | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| public override bool InTemplate => _parent.InTemplate; | ||
|
|
||
| /// <inheritdoc/> | ||
| public override Type TargetType => null; | ||
|
|
||
| public override string ToString() | ||
| { | ||
| if (_selectorString == null) | ||
| { | ||
| _selectorString = _parent.ToString() + " > "; | ||
| } | ||
|
|
||
| return _selectorString; | ||
| } | ||
|
|
||
| protected override SelectorMatch Evaluate(IStyleable control, bool subscribe) | ||
| { | ||
| var controlParent = ((ILogical)control).LogicalParent; | ||
|
|
||
| if (controlParent != null) | ||
| { | ||
| return _parent.Match((IStyleable)controlParent, subscribe); | ||
| } | ||
| else | ||
| { | ||
| return SelectorMatch.False; | ||
| } | ||
| } | ||
|
|
||
| protected override Selector MovePrevious() => null; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| // Copyright (c) The Perspex Project. All rights reserved. | ||
| // Licensed under the MIT license. See licence.md file in the project root for full license information. | ||
|
|
||
| using System; | ||
| using System.Collections.Generic; | ||
| using Perspex.LogicalTree; | ||
|
|
||
| namespace Perspex.Styling | ||
| { | ||
| internal class DescendentSelector : Selector | ||
| { | ||
| private readonly Selector _parent; | ||
| private string _selectorString; | ||
|
|
||
| public DescendentSelector(Selector parent) | ||
| { | ||
| if (parent == null) | ||
| { | ||
| throw new InvalidOperationException("Descendent selector must be preceeded by a selector."); | ||
| } | ||
|
|
||
| _parent = parent; | ||
| } | ||
|
|
||
| /// <inheritdoc/> | ||
| public override bool InTemplate => _parent.InTemplate; | ||
|
|
||
| /// <inheritdoc/> | ||
| public override Type TargetType => null; | ||
|
|
||
| public override string ToString() | ||
| { | ||
| if (_selectorString == null) | ||
| { | ||
| _selectorString = _parent.ToString() + ' '; | ||
| } | ||
|
|
||
| return _selectorString; | ||
| } | ||
|
|
||
| protected override SelectorMatch Evaluate(IStyleable control, bool subscribe) | ||
| { | ||
| ILogical c = (ILogical)control; | ||
| List<IObservable<bool>> descendentMatches = new List<IObservable<bool>>(); | ||
|
|
||
| while (c != null) | ||
| { | ||
| c = c.LogicalParent; | ||
|
|
||
| if (c is IStyleable) | ||
| { | ||
| var match = _parent.Match((IStyleable)c, subscribe); | ||
|
|
||
| if (match.ImmediateResult != null) | ||
| { | ||
| if (match.ImmediateResult == true) | ||
| { | ||
| return SelectorMatch.True; | ||
| } | ||
| } | ||
| else | ||
| { | ||
| descendentMatches.Add(match.ObservableResult); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if (descendentMatches.Count > 0) | ||
| { | ||
| return new SelectorMatch(StyleActivator.Or(descendentMatches)); | ||
| } | ||
| else | ||
| { | ||
| return SelectorMatch.False; | ||
| } | ||
| } | ||
|
|
||
| protected override Selector MovePrevious() => null; | ||
| } | ||
| } |
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