56 lines
2.2 KiB
C#
56 lines
2.2 KiB
C#
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using System;
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using System.Collections.Concurrent;
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namespace Rive
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{
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/// <summary>
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/// Base class representing any value that can be a property of a ViewModelInstance.
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/// This includes both primitive property values and nested view model instances.
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/// </summary>
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public abstract class ViewModelInstanceProperty
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{
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/// <summary>
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/// Cache of property instances to avoid creating multiple instances for the same native property
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/// </summary>
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private static readonly ConcurrentDictionary<IntPtr, WeakReference<ViewModelInstanceProperty>> s_propertiesCache =
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new ConcurrentDictionary<IntPtr, WeakReference<ViewModelInstanceProperty>>();
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/// <summary>
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/// Adds a globally cached view model property for a given pointer.
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/// </summary>
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/// <param name="ptr"> The pointer to the property.</param>
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/// <param name="property"> The C# property to cache.</param>
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internal static void AddGloballyCachedVMPropertyForPointer(IntPtr ptr, ViewModelInstanceProperty property)
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{
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s_propertiesCache[ptr] = new WeakReference<ViewModelInstanceProperty>(property);
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}
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/// <summary>
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/// Tries to get a globally cached view model property for a given pointer.
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/// </summary>
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/// <param name="ptr"> The pointer to the property.</param>
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/// <param name="property"> The C# property to cache.</param>
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/// <returns></returns>
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internal static bool TryGetGloballyCachedVMPropertyForPointer(IntPtr ptr, out ViewModelInstanceProperty property)
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{
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if (s_propertiesCache.TryGetValue(ptr, out var weakReference) &&
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weakReference.TryGetTarget(out property))
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{
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return true;
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}
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property = null;
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return false;
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}
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/// <summary>
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/// Removes a cached view model property for a given pointer.
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/// /// </summary>
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/// <param name="ptr"> The pointer to the property.</param>
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internal static void RemoveCachedPropertyForPointer(IntPtr ptr)
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{
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s_propertiesCache.TryRemove(ptr, out _);
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}
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}
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}
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