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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| using Avalonia.Collections; | ||
| using Avalonia.Collections.Pooled; | ||
| using Avalonia.Media; | ||
| using Avalonia.Rendering.Composition; | ||
| using Avalonia.Rendering.Composition.Server; | ||
| using Avalonia.VisualTree; | ||
|
|
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| namespace Avalonia; | ||
|
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| public partial class Visual | ||
| { | ||
| internal CompositionDrawListVisual? CompositionVisual { get; private set; } | ||
| internal CompositionVisual? ChildCompositionVisual { get; set; } | ||
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| private protected virtual CompositionDrawListVisual CreateCompositionVisual(Compositor compositor) | ||
| => new CompositionDrawListVisual(compositor, | ||
| new ServerCompositionDrawListVisual(compositor.Server, this), this); | ||
|
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| internal CompositionVisual AttachToCompositor(Compositor compositor) | ||
| { | ||
| if (CompositionVisual == null || CompositionVisual.Compositor != compositor) | ||
| { | ||
| CompositionVisual = CreateCompositionVisual(compositor); | ||
| } | ||
|
|
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| return CompositionVisual; | ||
| } | ||
|
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| internal virtual void DetachFromCompositor() | ||
| { | ||
| if (CompositionVisual != null) | ||
| { | ||
| if (ChildCompositionVisual != null) | ||
| CompositionVisual.Children.Remove(ChildCompositionVisual); | ||
|
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| CompositionVisual.DrawList = null; | ||
| CompositionVisual = null; | ||
| } | ||
| } | ||
|
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| internal virtual void SynchronizeCompositionChildVisuals() | ||
| { | ||
| if(CompositionVisual == null) | ||
| return; | ||
| var compositionChildren = CompositionVisual.Children; | ||
| var visualChildren = (AvaloniaList<Visual>)VisualChildren; | ||
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| PooledList<(Visual visual, int index)>? sortedChildren = null; | ||
| if (HasNonUniformZIndexChildren && visualChildren.Count > 1) | ||
| { | ||
| sortedChildren = new (visualChildren.Count); | ||
| for (var c = 0; c < visualChildren.Count; c++) | ||
| sortedChildren.Add((visualChildren[c], c)); | ||
|
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| // Regular Array.Sort is unstable, we need to provide indices as well to avoid reshuffling elements. | ||
| sortedChildren.Sort(static (lhs, rhs) => | ||
| { | ||
| var result = lhs.visual.ZIndex.CompareTo(rhs.visual.ZIndex); | ||
| return result == 0 ? lhs.index.CompareTo(rhs.index) : result; | ||
| }); | ||
| } | ||
|
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| var childVisual = ChildCompositionVisual; | ||
|
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| // Check if the current visual somehow got migrated to another compositor | ||
| if (childVisual != null && childVisual.Compositor != CompositionVisual.Compositor) | ||
| childVisual = null; | ||
|
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| var expectedCount = visualChildren.Count; | ||
| if (childVisual != null) | ||
| expectedCount++; | ||
|
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| if (compositionChildren.Count == expectedCount) | ||
| { | ||
| bool mismatch = false; | ||
| if (sortedChildren != null) | ||
| for (var c = 0; c < visualChildren.Count; c++) | ||
| { | ||
| if (!ReferenceEquals(compositionChildren[c], sortedChildren[c].visual.CompositionVisual)) | ||
| { | ||
| mismatch = true; | ||
| break; | ||
| } | ||
| } | ||
| else | ||
| for (var c = 0; c < visualChildren.Count; c++) | ||
| if (!ReferenceEquals(compositionChildren[c], visualChildren[c].CompositionVisual)) | ||
| { | ||
| mismatch = true; | ||
| break; | ||
| } | ||
|
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| if (childVisual != null && | ||
| !ReferenceEquals(compositionChildren[compositionChildren.Count - 1], childVisual)) | ||
| mismatch = true; | ||
|
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| if (!mismatch) | ||
| { | ||
| sortedChildren?.Dispose(); | ||
| return; | ||
| } | ||
| } | ||
|
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| compositionChildren.Clear(); | ||
| if (sortedChildren != null) | ||
| { | ||
| foreach (var ch in sortedChildren) | ||
| { | ||
| var compositionChild = ch.visual.CompositionVisual; | ||
| if (compositionChild != null) | ||
| compositionChildren.Add(compositionChild); | ||
| } | ||
| sortedChildren.Dispose(); | ||
| } | ||
| else | ||
| foreach (var ch in visualChildren) | ||
| { | ||
| var compositionChild = ch.CompositionVisual; | ||
| if (compositionChild != null) | ||
| compositionChildren.Add(compositionChild); | ||
| } | ||
|
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| if (childVisual != null) | ||
| compositionChildren.Add(childVisual); | ||
| } | ||
|
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| internal virtual void SynchronizeCompositionProperties() | ||
| { | ||
| if(CompositionVisual == null) | ||
| return; | ||
| var comp = CompositionVisual; | ||
|
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| // TODO: Introduce a dirty mask like WPF has, so we don't overwrite properties every time | ||
|
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| comp.Offset = new (Bounds.Left, Bounds.Top, 0); | ||
| comp.Size = new (Bounds.Width, Bounds.Height); | ||
| comp.Visible = IsVisible; | ||
| comp.Opacity = (float)Opacity; | ||
| comp.ClipToBounds = ClipToBounds; | ||
| comp.Clip = Clip?.PlatformImpl; | ||
|
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| if (!Equals(comp.OpacityMask, OpacityMask)) | ||
| comp.OpacityMask = OpacityMask?.ToImmutable(); | ||
|
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| if (!comp.Effect.EffectEquals(Effect)) | ||
| comp.Effect = Effect?.ToImmutable(); | ||
|
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| comp.RenderOptions = RenderOptions; | ||
|
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| var renderTransform = Matrix.Identity; | ||
|
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| if (HasMirrorTransform) | ||
| renderTransform = new Matrix(-1.0, 0.0, 0.0, 1.0, Bounds.Width, 0); | ||
|
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| if (RenderTransform != null) | ||
| { | ||
| var origin = RenderTransformOrigin.ToPixels(new Size(Bounds.Width, Bounds.Height)); | ||
| var offset = Matrix.CreateTranslation(origin); | ||
| renderTransform *= (-offset) * RenderTransform.Value * (offset); | ||
| } | ||
|
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| comp.TransformMatrix = renderTransform; | ||
| } | ||
| } |
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