refactor: split large files into partial classes by concern

Split LinuxApplication into Input and Lifecycle partials. Extract SkiaView into Accessibility, Drawing, and Input partials. Split SkiaEntry and SkiaEditor into Drawing and Input partials. Extract TextRenderingHelper from SkiaRenderingEngine. Create dedicated files for SkiaAbsoluteLayout, SkiaGrid, and SkiaStackLayout. This reduces file sizes from 40K+ lines to manageable units organized by responsibility.
2026-03-06 22:36:23 -05:00
parent ee60b983a4
commit 077abc2feb
20 changed files with 4693 additions and 4577 deletions
--- a/Views/SkiaAbsoluteLayout.cs
+++ b/Views/SkiaAbsoluteLayout.cs
@@ -0,0 +1,160 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.Maui.Graphics;
+using Microsoft.Maui.Platform.Linux.Services;
+using SkiaSharp;
+using Microsoft.Maui;
+
+namespace Microsoft.Maui.Platform;
+
+/// <summary>
+/// Absolute layout that positions children at exact coordinates.
+/// </summary>
+public class SkiaAbsoluteLayout : SkiaLayoutView
+{
+    private readonly Dictionary<SkiaView, AbsoluteLayoutBounds> _childBounds = new();
+
+    /// <summary>
+    /// Adds a child at the specified position and size.
+    /// </summary>
+    public void AddChild(SkiaView child, SKRect bounds, AbsoluteLayoutFlags flags = AbsoluteLayoutFlags.None)
+    {
+        base.AddChild(child);
+        _childBounds[child] = new AbsoluteLayoutBounds(bounds, flags);
+    }
+
+    public override void RemoveChild(SkiaView child)
+    {
+        base.RemoveChild(child);
+        _childBounds.Remove(child);
+    }
+
+    /// <summary>
+    /// Gets the layout bounds for a child.
+    /// </summary>
+    public AbsoluteLayoutBounds GetLayoutBounds(SkiaView child)
+    {
+        return _childBounds.TryGetValue(child, out var bounds)
+            ? bounds
+            : new AbsoluteLayoutBounds(SKRect.Empty, AbsoluteLayoutFlags.None);
+    }
+
+    /// <summary>
+    /// Sets the layout bounds for a child.
+    /// </summary>
+    public void SetLayoutBounds(SkiaView child, SKRect bounds, AbsoluteLayoutFlags flags = AbsoluteLayoutFlags.None)
+    {
+        _childBounds[child] = new AbsoluteLayoutBounds(bounds, flags);
+        InvalidateMeasure();
+        Invalidate();
+    }
+
+    protected override Size MeasureOverride(Size availableSize)
+    {
+        float maxRight = 0;
+        float maxBottom = 0;
+
+        foreach (var child in Children)
+        {
+            if (!child.IsVisible) continue;
+
+            var layout = GetLayoutBounds(child);
+            var bounds = layout.Bounds;
+
+            child.Measure(new Size(bounds.Width, bounds.Height));
+
+            maxRight = Math.Max(maxRight, bounds.Right);
+            maxBottom = Math.Max(maxBottom, bounds.Bottom);
+        }
+
+        return new Size(
+            maxRight + Padding.Left + Padding.Right,
+            maxBottom + Padding.Top + Padding.Bottom);
+    }
+
+    protected override Rect ArrangeOverride(Rect bounds)
+    {
+        var content = GetContentBounds(new SKRect((float)bounds.Left, (float)bounds.Top, (float)bounds.Right, (float)bounds.Bottom));
+
+        foreach (var child in Children)
+        {
+            if (!child.IsVisible) continue;
+
+            var layout = GetLayoutBounds(child);
+            var childBounds = layout.Bounds;
+            var flags = layout.Flags;
+
+            float x, y, width, height;
+
+            // X position
+            if (flags.HasFlag(AbsoluteLayoutFlags.XProportional))
+                x = content.Left + childBounds.Left * content.Width;
+            else
+                x = content.Left + childBounds.Left;
+
+            // Y position
+            if (flags.HasFlag(AbsoluteLayoutFlags.YProportional))
+                y = content.Top + childBounds.Top * content.Height;
+            else
+                y = content.Top + childBounds.Top;
+
+            // Width
+            if (flags.HasFlag(AbsoluteLayoutFlags.WidthProportional))
+                width = childBounds.Width * content.Width;
+            else if (childBounds.Width < 0)
+                width = (float)child.DesiredSize.Width;
+            else
+                width = childBounds.Width;
+
+            // Height
+            if (flags.HasFlag(AbsoluteLayoutFlags.HeightProportional))
+                height = childBounds.Height * content.Height;
+            else if (childBounds.Height < 0)
+                height = (float)child.DesiredSize.Height;
+            else
+                height = childBounds.Height;
+
+            // Apply child's margin
+            var margin = child.Margin;
+            var marginedBounds = new Rect(
+                x + (float)margin.Left,
+                y + (float)margin.Top,
+                width - (float)margin.Left - (float)margin.Right,
+                height - (float)margin.Top - (float)margin.Bottom);
+            child.Arrange(marginedBounds);
+        }
+        return bounds;
+    }
+}
+
+/// <summary>
+/// Absolute layout bounds for a child.
+/// </summary>
+public readonly struct AbsoluteLayoutBounds
+{
+    public SKRect Bounds { get; }
+    public AbsoluteLayoutFlags Flags { get; }
+
+    public AbsoluteLayoutBounds(SKRect bounds, AbsoluteLayoutFlags flags)
+    {
+        Bounds = bounds;
+        Flags = flags;
+    }
+}
+
+/// <summary>
+/// Flags for absolute layout positioning.
+/// </summary>
+[Flags]
+public enum AbsoluteLayoutFlags
+{
+    None = 0,
+    XProportional = 1,
+    YProportional = 2,
+    WidthProportional = 4,
+    HeightProportional = 8,
+    PositionProportional = XProportional | YProportional,
+    SizeProportional = WidthProportional | HeightProportional,
+    All = XProportional | YProportional | WidthProportional | HeightProportional
+}