Steven Kirk
11 years ago
82 changed files with 1603 additions and 319 deletions
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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namespace Perspex.Markup.Xaml.Context |
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{ |
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internal class NameScopeWrapper : OmniXaml.INameScope |
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{ |
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private Perspex.INameScope _inner; |
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public NameScopeWrapper(Perspex.INameScope inner) |
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{ |
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_inner = inner; |
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} |
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public object Find(string name) |
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{ |
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return _inner.Find(name); |
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} |
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public void Register(string name, object scopedElement) |
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{ |
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_inner.Register(name, scopedElement); |
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} |
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public void Unregister(string name) |
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{ |
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_inner.Unregister(name); |
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} |
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} |
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} |
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@ -1 +1 @@ |
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Subproject commit 55fc2abc715885d3686f8c8605f34714445cd72f |
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Subproject commit 3e3b46ba66941da925092e2977003d0553cfc907 |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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using System; |
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using System.Linq; |
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using System.Reactive.Linq; |
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using Perspex.Controls; |
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namespace Perspex.Markup |
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{ |
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/// <summary>
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/// Locates controls relative to other controls.
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/// </summary>
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public static class ControlLocator |
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{ |
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/// <summary>
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/// Tracks a named control relative to another control.
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/// </summary>
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/// <param name="relativeTo">
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/// The control relative from which the other control should be found.
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/// </param>
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/// <param name="name">The name of the control to find.</param>
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public static IObservable<IControl> Track(IControl relativeTo, string name) |
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{ |
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var attached = Observable.FromEventPattern<VisualTreeAttachmentEventArgs>( |
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x => relativeTo.AttachedToVisualTree += x, |
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x => relativeTo.DetachedFromVisualTree += x) |
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.Select(x => x.EventArgs.NameScope) |
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.StartWith(relativeTo.FindNameScope()); |
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var detached = Observable.FromEventPattern<VisualTreeAttachmentEventArgs>( |
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x => relativeTo.DetachedFromVisualTree += x, |
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x => relativeTo.DetachedFromVisualTree += x) |
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.Select(x => (INameScope)null); |
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return attached.Merge(detached).Select(nameScope => |
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{ |
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if (nameScope != null) |
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{ |
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var registered = Observable.FromEventPattern<NameScopeEventArgs>( |
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x => nameScope.Registered += x, |
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x => nameScope.Registered -= x) |
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.Where(x => x.EventArgs.Name == name) |
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.Select(x => x.EventArgs.Element) |
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.OfType<IControl>(); |
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var unregistered = Observable.FromEventPattern<NameScopeEventArgs>( |
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x => nameScope.Unregistered += x, |
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x => nameScope.Unregistered -= x); |
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return registered |
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.StartWith(nameScope.Find<IControl>(name)) |
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.TakeUntil(unregistered); |
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} |
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else |
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{ |
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return Observable.Return<IControl>(null); |
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} |
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}).Switch(); |
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} |
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} |
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} |
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@ -0,0 +1,43 @@ |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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using System; |
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namespace Perspex |
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{ |
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/// <summary>
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/// Defines a name scope.
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/// </summary>
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public interface INameScope |
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{ |
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/// <summary>
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/// Raised when an element is registered with the name scope.
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/// </summary>
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event EventHandler<NameScopeEventArgs> Registered; |
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/// <summary>
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/// Raised when an element is unregistered with the name scope.
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/// </summary>
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event EventHandler<NameScopeEventArgs> Unregistered; |
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/// <summary>
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/// Registers an element eith the name scope.
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/// </summary>
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/// <param name="name">The element name.</param>
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/// <param name="element">The element.</param>
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void Register(string name, object element); |
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/// <summary>
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/// Finds a named element in the name scope.
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/// </summary>
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/// <param name="name">The name.</param>
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/// <returns>The element, or null if the name was not found.</returns>
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object Find(string name); |
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/// <summary>
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/// Unregisters an element with the name scope.
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/// </summary>
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/// <param name="name">The name.</param>
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void Unregister(string name); |
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} |
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} |
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@ -1,10 +1,16 @@ |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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namespace Perspex.Styling |
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namespace Perspex |
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{ |
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/// <summary>
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/// Interface for named elements.
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/// </summary>
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public interface INamed |
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{ |
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/// <summary>
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/// Gets the element name.
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/// </summary>
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string Name { get; } |
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} |
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} |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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using System; |
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using System.Collections.Generic; |
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namespace Perspex |
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{ |
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/// <summary>
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/// Implements a name scope.
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/// </summary>
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public class NameScope : INameScope |
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{ |
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/// <summary>
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/// Defines the NameScope attached property.
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/// </summary>
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public static readonly PerspexProperty<INameScope> NameScopeProperty = |
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PerspexProperty.RegisterAttached<NameScope, Visual, INameScope>("NameScope"); |
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private readonly Dictionary<string, object> _inner = new Dictionary<string, object>(); |
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/// <summary>
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/// Raised when an element is registered with the name scope.
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/// </summary>
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public event EventHandler<NameScopeEventArgs> Registered; |
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/// <summary>
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/// Raised when an element is unregistered with the name scope.
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/// </summary>
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public event EventHandler<NameScopeEventArgs> Unregistered; |
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/// <summary>
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/// Gets the value of the attached <see cref="NameScopeProperty"/> on a visual.
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/// </summary>
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/// <param name="visual">The visual.</param>
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/// <returns>The value of the NameScope attached property.</returns>
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public static INameScope GetNameScope(Visual visual) |
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{ |
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return visual.GetValue(NameScopeProperty); |
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} |
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/// <summary>
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/// Sets the value of the attached <see cref="NameScopeProperty"/> on a visual.
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/// </summary>
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/// <param name="visual">The visual.</param>
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/// <param name="value">The value to set.</param>
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public static void SetNameScope(Visual visual, INameScope value) |
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{ |
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visual.SetValue(NameScopeProperty, value); |
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} |
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/// <summary>
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/// Registers an element with the name scope.
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/// </summary>
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/// <param name="name">The element name.</param>
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/// <param name="element">The element.</param>
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public void Register(string name, object element) |
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{ |
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Contract.Requires<ArgumentNullException>(name != null); |
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Contract.Requires<ArgumentNullException>(element != null); |
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object existing; |
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if (_inner.TryGetValue(name, out existing)) |
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{ |
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if (existing != element) |
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{ |
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throw new ArgumentException($"Control with the name '{name}' already registered."); |
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} |
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} |
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else |
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{ |
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_inner.Add(name, element); |
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Registered?.Invoke(this, new NameScopeEventArgs(name, element)); |
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} |
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} |
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/// <summary>
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/// Finds a named element in the name scope.
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/// </summary>
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/// <param name="name">The name.</param>
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/// <returns>The element, or null if the name was not found.</returns>
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public object Find(string name) |
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{ |
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Contract.Requires<ArgumentNullException>(name != null); |
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object result; |
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_inner.TryGetValue(name, out result); |
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return result; |
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} |
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/// <summary>
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/// Unregisters an element with the name scope.
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/// </summary>
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/// <param name="name">The name.</param>
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public void Unregister(string name) |
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{ |
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Contract.Requires<ArgumentNullException>(name != null); |
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object element; |
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if (_inner.TryGetValue(name, out element)) |
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{ |
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_inner.Remove(name); |
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Registered?.Invoke(this, new NameScopeEventArgs(name, element)); |
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} |
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} |
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} |
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} |
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@ -0,0 +1,19 @@ |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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using System; |
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namespace Perspex |
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{ |
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public class NameScopeEventArgs : EventArgs |
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{ |
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public NameScopeEventArgs(string name, object element) |
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{ |
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Name = name; |
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Element = element; |
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} |
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public string Name { get; } |
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public object Element { get; } |
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} |
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} |
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@ -0,0 +1,68 @@ |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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using System; |
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using System.Collections.Generic; |
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namespace Perspex |
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{ |
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/// <summary>
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/// Extension methods for <see cref="INameScope"/>.
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/// </summary>
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public static class NameScopeExtensions |
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{ |
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/// <summary>
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/// Finds a named element in an <see cref="INameScope"/>.
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/// </summary>
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/// <typeparam name="T">The element type.</typeparam>
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/// <param name="nameScope">The name scope.</param>
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/// <param name="name">The name.</param>
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/// <returns>The named element or null if not found.</returns>
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public static T Find<T>(this INameScope nameScope, string name) |
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where T : class |
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{ |
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Contract.Requires<ArgumentNullException>(nameScope != null); |
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Contract.Requires<ArgumentNullException>(name != null); |
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var result = nameScope.Find(name); |
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if (result != null && !(result is T)) |
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{ |
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throw new InvalidOperationException( |
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$"Expected control '{name}' to be '{typeof(T)} but it was '{result.GetType()}'."); |
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} |
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return (T)result; |
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} |
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/// <summary>
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/// Gets a named element from an <see cref="INameScope"/> or throws if no element of the
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/// requested name was found.
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/// </summary>
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/// <typeparam name="T">The element type.</typeparam>
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/// <param name="nameScope">The name scope.</param>
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/// <param name="name">The name.</param>
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/// <returns>The named element.</returns>
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public static T Get<T>(this INameScope nameScope, string name) |
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where T : class |
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{ |
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Contract.Requires<ArgumentNullException>(nameScope != null); |
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Contract.Requires<ArgumentNullException>(name != null); |
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var result = nameScope.Find(name); |
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if (result == null) |
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{ |
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throw new KeyNotFoundException($"Could not find control '{name}'."); |
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} |
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if (!(result is T)) |
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{ |
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throw new InvalidOperationException( |
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$"Expected control '{name}' to be '{typeof(T)} but it was '{result.GetType()}'."); |
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} |
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return (T)result; |
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} |
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} |
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} |
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@ -0,0 +1,36 @@ |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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using System; |
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using Perspex.Rendering; |
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namespace Perspex |
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{ |
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/// <summary>
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/// Holds the event arguments for the <see cref="Visual.AttachedToVisualTree"/> and
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/// <see cref="Visual.DetachedFromVisualTree"/> events.
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/// </summary>
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public class VisualTreeAttachmentEventArgs : EventArgs |
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{ |
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/// <summary>
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/// Initializes a new instance of the <see cref="VisualTreeAttachmentEventArgs"/> class.
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/// </summary>
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/// <param name="root">The root visual.</param>
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/// <param name="nameScope">The name scope.</param>
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public VisualTreeAttachmentEventArgs(IRenderRoot root, INameScope nameScope) |
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{ |
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Root = root; |
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NameScope = nameScope; |
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} |
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/// <summary>
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/// Gets the root of the visual tree that the visual is being attached to or detached from.
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/// </summary>
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public IRenderRoot Root { get; } |
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/// <summary>
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/// Gets the element's name scope.
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/// </summary>
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public INameScope NameScope { get; } |
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} |
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} |
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@ -0,0 +1,122 @@ |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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using System; |
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using System.Collections.Generic; |
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using System.Reactive.Linq; |
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using Perspex.Controls; |
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using Xunit; |
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namespace Perspex.Markup.UnitTests |
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{ |
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public class ControlLocatorTests |
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{ |
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[Fact] |
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public async void Track_By_Name_Should_Find_Control_Added_Earlier() |
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{ |
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TextBlock target; |
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TextBlock relativeTo; |
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var root = new TestRoot |
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{ |
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Child = new StackPanel |
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{ |
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Children = new Controls.Controls |
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{ |
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(target = new TextBlock { Name = "target" }), |
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(relativeTo = new TextBlock { Name = "start" }), |
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} |
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} |
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}; |
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var locator = ControlLocator.Track(relativeTo, "target"); |
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var result = await locator.Take(1); |
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Assert.Same(target, result); |
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Assert.Equal(0, root.NameScopeRegisteredSubscribers); |
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Assert.Equal(0, root.NameScopeUnregisteredSubscribers); |
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} |
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[Fact] |
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public void Track_By_Name_Should_Find_Control_Added_Later() |
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{ |
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StackPanel panel; |
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TextBlock relativeTo; |
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var root = new TestRoot |
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{ |
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Child = (panel = new StackPanel |
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{ |
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Children = new Controls.Controls |
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{ |
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(relativeTo = new TextBlock |
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{ |
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Name = "start" |
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}), |
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} |
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}) |
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}; |
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var locator = ControlLocator.Track(relativeTo, "target"); |
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var target = new TextBlock { Name = "target" }; |
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var result = new List<IControl>(); |
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using (locator.Subscribe(x => result.Add(x))) |
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{ |
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panel.Children.Add(target); |
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} |
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Assert.Equal(new[] { null, target }, result); |
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Assert.Equal(0, root.NameScopeRegisteredSubscribers); |
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Assert.Equal(0, root.NameScopeUnregisteredSubscribers); |
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} |
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|
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[Fact] |
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public void Track_By_Name_Should_Find_Control_When_Tree_Changed() |
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{ |
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TextBlock target1; |
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TextBlock target2; |
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TextBlock relativeTo; |
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var root1 = new TestRoot |
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{ |
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Child = new StackPanel |
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{ |
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Children = new Controls.Controls |
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{ |
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(relativeTo = new TextBlock |
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{ |
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Name = "start" |
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}), |
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(target1 = new TextBlock { Name = "target" }), |
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} |
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} |
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}; |
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|
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var root2 = new TestRoot |
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{ |
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Child = new StackPanel |
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{ |
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Children = new Controls.Controls |
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{ |
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(target2 = new TextBlock { Name = "target" }), |
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} |
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} |
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}; |
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|
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var locator = ControlLocator.Track(relativeTo, "target"); |
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var target = new TextBlock { Name = "target" }; |
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var result = new List<IControl>(); |
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using (locator.Subscribe(x => result.Add(x))) |
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{ |
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((StackPanel)root1.Child).Children.Remove(relativeTo); |
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((StackPanel)root2.Child).Children.Add(relativeTo); |
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} |
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|
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Assert.Equal(new[] { target1, null, target2 }, result); |
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Assert.Equal(0, root1.NameScopeRegisteredSubscribers); |
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Assert.Equal(0, root1.NameScopeUnregisteredSubscribers); |
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} |
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} |
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} |
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@ -0,0 +1,61 @@ |
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// Copyright (c) The Perspex Project. All rights reserved.
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// Licensed under the MIT license. See licence.md file in the project root for full license information.
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|
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using System; |
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using Perspex.Controls; |
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using Perspex.Platform; |
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using Perspex.Rendering; |
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namespace Perspex.Markup.UnitTests |
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{ |
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public class TestRoot : Decorator, IRenderRoot, INameScope |
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{ |
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private NameScope _nameScope = new NameScope(); |
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event EventHandler<NameScopeEventArgs> INameScope.Registered |
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{ |
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add { _nameScope.Registered += value; ++NameScopeRegisteredSubscribers; } |
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remove { _nameScope.Registered -= value; --NameScopeRegisteredSubscribers; } |
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} |
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|
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public event EventHandler<NameScopeEventArgs> Unregistered |
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{ |
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add { _nameScope.Unregistered += value; ++NameScopeUnregisteredSubscribers; } |
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remove { _nameScope.Unregistered -= value; --NameScopeUnregisteredSubscribers; } |
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} |
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|
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public int NameScopeRegisteredSubscribers { get; private set; } |
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|
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public int NameScopeUnregisteredSubscribers { get; private set; } |
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|
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public IRenderTarget RenderTarget |
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{ |
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get { throw new NotImplementedException(); } |
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} |
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|
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public IRenderQueueManager RenderQueueManager |
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{ |
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get { throw new NotImplementedException(); } |
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} |
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|
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public Point TranslatePointToScreen(Point p) |
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{ |
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throw new NotImplementedException(); |
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} |
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|
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public void Register(string name, object element) |
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{ |
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_nameScope.Register(name, element); |
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} |
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|
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public object Find(string name) |
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{ |
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return _nameScope.Find(name); |
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} |
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|
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public void Unregister(string name) |
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{ |
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_nameScope.Unregister(name); |
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} |
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} |
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} |
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@ -0,0 +1,83 @@ |
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// 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.
|
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|
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using Perspex.Controls; |
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using Perspex.Markup.Xaml.Data; |
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using Xunit; |
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|
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namespace Perspex.Markup.Xaml.UnitTests.Data |
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{ |
|||
public class BindingTests_ElementName |
|||
{ |
|||
[Fact] |
|||
public void Should_Bind_To_Element() |
|||
{ |
|||
TextBlock target; |
|||
var root = new TestRoot |
|||
{ |
|||
Child = new StackPanel |
|||
{ |
|||
Children = new Controls.Controls |
|||
{ |
|||
new TextBlock |
|||
{ |
|||
Name = "source", |
|||
Text = "foo", |
|||
}, |
|||
(target = new TextBlock |
|||
{ |
|||
Name = "target", |
|||
}) |
|||
} |
|||
} |
|||
}; |
|||
|
|||
var binding = new Binding |
|||
{ |
|||
ElementName = "source", |
|||
Path = "Text", |
|||
}; |
|||
|
|||
binding.Bind(target, TextBlock.TextProperty); |
|||
|
|||
Assert.Equal("foo", target.Text); |
|||
} |
|||
|
|||
[Fact] |
|||
public void Should_Bind_To_Later_Added_Element() |
|||
{ |
|||
TextBlock target; |
|||
StackPanel stackPanel; |
|||
|
|||
var root = new TestRoot |
|||
{ |
|||
Child = stackPanel = new StackPanel |
|||
{ |
|||
Children = new Controls.Controls |
|||
{ |
|||
(target = new TextBlock |
|||
{ |
|||
Name = "target", |
|||
}), |
|||
} |
|||
} |
|||
}; |
|||
|
|||
var binding = new Binding |
|||
{ |
|||
ElementName = "source", |
|||
Path = "Text", |
|||
}; |
|||
|
|||
binding.Bind(target, TextBlock.TextProperty); |
|||
|
|||
stackPanel.Children.Add(new TextBlock |
|||
{ |
|||
Name = "source", |
|||
Text = "foo", |
|||
}); |
|||
|
|||
Assert.Equal("foo", target.Text); |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,61 @@ |
|||
// 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.Controls; |
|||
using Perspex.Platform; |
|||
using Perspex.Rendering; |
|||
|
|||
namespace Perspex.Markup.Xaml.UnitTests |
|||
{ |
|||
public class TestRoot : Decorator, IRenderRoot, INameScope |
|||
{ |
|||
private readonly NameScope _nameScope = new NameScope(); |
|||
|
|||
event EventHandler<NameScopeEventArgs> INameScope.Registered |
|||
{ |
|||
add { _nameScope.Registered += value; ++NameScopeRegisteredSubscribers; } |
|||
remove { _nameScope.Registered -= value; --NameScopeRegisteredSubscribers; } |
|||
} |
|||
|
|||
public event EventHandler<NameScopeEventArgs> Unregistered |
|||
{ |
|||
add { _nameScope.Unregistered += value; ++NameScopeUnregisteredSubscribers; } |
|||
remove { _nameScope.Unregistered -= value; --NameScopeUnregisteredSubscribers; } |
|||
} |
|||
|
|||
public int NameScopeRegisteredSubscribers { get; private set; } |
|||
|
|||
public int NameScopeUnregisteredSubscribers { get; private set; } |
|||
|
|||
public IRenderTarget RenderTarget |
|||
{ |
|||
get { throw new NotImplementedException(); } |
|||
} |
|||
|
|||
public IRenderQueueManager RenderQueueManager |
|||
{ |
|||
get { throw new NotImplementedException(); } |
|||
} |
|||
|
|||
public Point TranslatePointToScreen(Point p) |
|||
{ |
|||
throw new NotImplementedException(); |
|||
} |
|||
|
|||
public void Register(string name, object element) |
|||
{ |
|||
_nameScope.Register(name, element); |
|||
} |
|||
|
|||
public object Find(string name) |
|||
{ |
|||
return _nameScope.Find(name); |
|||
} |
|||
|
|||
public void Unregister(string name) |
|||
{ |
|||
_nameScope.Unregister(name); |
|||
} |
|||
} |
|||
} |
|||
@ -0,0 +1,55 @@ |
|||
// 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 Xunit; |
|||
|
|||
namespace Perspex.SceneGraph.UnitTests |
|||
{ |
|||
public class NameScopeTests |
|||
{ |
|||
[Fact] |
|||
public void Register_Registers_Element() |
|||
{ |
|||
var target = new NameScope(); |
|||
var element = new object(); |
|||
|
|||
target.Register("foo", element); |
|||
|
|||
Assert.Same(element, target.Find("foo")); |
|||
} |
|||
|
|||
[Fact] |
|||
public void Unregister_Unregisters_Element() |
|||
{ |
|||
var target = new NameScope(); |
|||
var element = new object(); |
|||
|
|||
target.Register("foo", element); |
|||
target.Unregister("foo"); |
|||
|
|||
Assert.Null(target.Find("foo")); |
|||
} |
|||
|
|||
[Fact] |
|||
public void Cannot_Register_New_Element_With_Existing_Name() |
|||
{ |
|||
var target = new NameScope(); |
|||
|
|||
target.Register("foo", new object()); |
|||
Assert.Throws<ArgumentException>(() => target.Register("foo", new object())); |
|||
} |
|||
|
|||
[Fact] |
|||
public void Can_Register_Same_Element_More_Than_Once() |
|||
{ |
|||
var target = new NameScope(); |
|||
var element = new object(); |
|||
|
|||
target.Register("foo", element); |
|||
target.Register("foo", element); |
|||
|
|||
Assert.Same(element, target.Find("foo")); |
|||
} |
|||
} |
|||
} |
|||
Loading…
Reference in new issue