Missing items

Hosting/LinuxMauiAppBuilderExtensions.cs

@@ -54,6 +54,24 @@ public static class LinuxMauiAppBuilderExtensions
         builder.Services.TryAddSingleton<IBrowser, BrowserService>();
         builder.Services.TryAddSingleton<IEmail, EmailService>();
 
+        // Register theming and accessibility services
+        builder.Services.TryAddSingleton<SystemThemeService>();
+        builder.Services.TryAddSingleton<HighContrastService>();
+
+        // Register accessibility service
+        builder.Services.TryAddSingleton<IAccessibilityService>(_ => AccessibilityServiceFactory.Instance);
+
+        // Register input method service
+        builder.Services.TryAddSingleton<IInputMethodService>(_ => InputMethodServiceFactory.Instance);
+
+        // Register font fallback manager
+        builder.Services.TryAddSingleton(_ => FontFallbackManager.Instance);
+
+        // Register additional Linux-specific services
+        builder.Services.TryAddSingleton<FolderPickerService>();
+        builder.Services.TryAddSingleton<NotificationService>();
+        builder.Services.TryAddSingleton<SystemTrayService>();
+
         // Register GTK host service
         builder.Services.TryAddSingleton(_ => GtkHostService.Instance);
 

LinuxApplication.cs

@@ -265,17 +265,27 @@ public class LinuxApplication : IDisposable
                     currentProperty.SetValue(null, mauiApplication);
                 }
 
-                // Handle theme changes
+                // Handle user-initiated theme changes
                 ((BindableObject)mauiApplication).PropertyChanged += (s, e) =>
                 {
                     if (e.PropertyName == "UserAppTheme")
                     {
-                        Console.WriteLine($"[LinuxApplication] Theme changed to: {mauiApplication.UserAppTheme}");
+                        Console.WriteLine($"[LinuxApplication] User theme changed to: {mauiApplication.UserAppTheme}");
                         LinuxViewRenderer.CurrentSkiaShell?.RefreshTheme();
                         linuxApp._renderingEngine?.InvalidateAll();
                     }
                 };
 
+                // Handle system theme changes (e.g., GNOME/KDE dark mode toggle)
+                SystemThemeService.Instance.ThemeChanged += (s, e) =>
+                {
+                    Console.WriteLine($"[LinuxApplication] System theme changed to: {e.NewTheme}");
+                    // Notify MAUI framework that system theme changed
+                    // This will cause AppThemeBinding to re-evaluate
+                    LinuxViewRenderer.CurrentSkiaShell?.RefreshTheme();
+                    linuxApp._renderingEngine?.InvalidateAll();
+                };
+
                 if (mauiApplication.MainPage != null)
                 {
                     var mainPage = mauiApplication.MainPage;

Services/AppInfoService.cs

@@ -39,23 +39,13 @@ public class AppInfoService : IAppInfo
     {
         get
         {
-            try
+            // Use SystemThemeService for consistent theme detection across the platform
+            return SystemThemeService.Instance.CurrentTheme switch
             {
-                var environmentVariable = Environment.GetEnvironmentVariable("GTK_THEME");
-                if (!string.IsNullOrEmpty(environmentVariable) && environmentVariable.Contains("dark", StringComparison.OrdinalIgnoreCase))
-                {
-                    return AppTheme.Dark;
-                }
-                if (GetGnomeColorScheme().Contains("dark", StringComparison.OrdinalIgnoreCase))
-                {
-                    return AppTheme.Dark;
-                }
-                return AppTheme.Light;
-            }
-            catch
-            {
-                return AppTheme.Light;
-            }
+                SystemTheme.Dark => AppTheme.Dark,
+                SystemTheme.Light => AppTheme.Light,
+                _ => AppTheme.Unspecified
+            };
         }
     }
 
@@ -88,31 +78,6 @@ public class AppInfoService : IAppInfo
         _buildString = _entryAssembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion ?? _versionString;
     }
 
-    private string GetGnomeColorScheme()
-    {
-        try
-        {
-            using Process? process = Process.Start(new ProcessStartInfo
-            {
-                FileName = "gsettings",
-                Arguments = "get org.gnome.desktop.interface color-scheme",
-                UseShellExecute = false,
-                RedirectStandardOutput = true,
-                CreateNoWindow = true
-            });
-            if (process != null)
-            {
-                string text = process.StandardOutput.ReadToEnd();
-                process.WaitForExit(1000);
-                return text.Trim().Trim('\'');
-            }
-        }
-        catch
-        {
-        }
-        return "";
-    }
-
     public void ShowSettingsUI()
     {
         try

Views/SkiaEditor.cs

@@ -6,14 +6,16 @@ using System.Collections.Generic;
 using Microsoft.Maui.Controls;
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Platform.Linux.Rendering;
+using Microsoft.Maui.Platform.Linux.Services;
 using SkiaSharp;
 
 namespace Microsoft.Maui.Platform;
 
 /// <summary>
 /// Skia-rendered multiline text editor control with full XAML styling support.
+/// Implements IInputContext for IME (Input Method Editor) support.
 /// </summary>
-public class SkiaEditor : SkiaView
+public class SkiaEditor : SkiaView, IInputContext
 {
     #region BindableProperties
 
@@ -344,6 +346,30 @@ public class SkiaEditor : SkiaView
         return string.IsNullOrEmpty(FontFamily) ? "Sans" : FontFamily;
     }
 
+    /// <summary>
+    /// Determines if text should be rendered right-to-left based on FlowDirection.
+    /// </summary>
+    private bool IsRightToLeft()
+    {
+        return FlowDirection == FlowDirection.RightToLeft;
+    }
+
+    /// <summary>
+    /// Gets the horizontal alignment accounting for FlowDirection.
+    /// </summary>
+    private float GetEffectiveTextX(SKRect contentBounds, float textWidth)
+    {
+        bool isRtl = IsRightToLeft();
+
+        return HorizontalTextAlignment switch
+        {
+            TextAlignment.Start => isRtl ? contentBounds.Right - textWidth : contentBounds.Left,
+            TextAlignment.Center => contentBounds.MidX - textWidth / 2,
+            TextAlignment.End => isRtl ? contentBounds.Left : contentBounds.Right - textWidth,
+            _ => isRtl ? contentBounds.Right - textWidth : contentBounds.Left
+        };
+    }
+
     #endregion
 
     #region Properties
@@ -609,6 +635,96 @@ public class SkiaEditor : SkiaView
     private float _lastClickY;
     private const double DoubleClickThresholdMs = 400;
 
+    // IME (Input Method Editor) support
+    private string _preEditText = string.Empty;
+    private int _preEditCursorPosition;
+    private IInputMethodService? _inputMethodService;
+
+    #region IInputContext Implementation
+
+    /// <summary>
+    /// Gets or sets the text for IME context.
+    /// </summary>
+    string IInputContext.Text
+    {
+        get => Text;
+        set => Text = value;
+    }
+
+    /// <summary>
+    /// Gets or sets the cursor position for IME context.
+    /// </summary>
+    int IInputContext.CursorPosition
+    {
+        get => _cursorPosition;
+        set => CursorPosition = value;
+    }
+
+    /// <summary>
+    /// Gets the selection start for IME context.
+    /// </summary>
+    int IInputContext.SelectionStart => _selectionStart;
+
+    /// <summary>
+    /// Gets the selection length for IME context.
+    /// </summary>
+    int IInputContext.SelectionLength => _selectionLength;
+
+    /// <summary>
+    /// Called when IME commits text.
+    /// </summary>
+    public void OnTextCommitted(string text)
+    {
+        if (IsReadOnly) return;
+
+        // Delete selection if any
+        if (_selectionLength != 0)
+        {
+            DeleteSelection();
+        }
+
+        // Clear pre-edit text
+        _preEditText = string.Empty;
+        _preEditCursorPosition = 0;
+
+        // Check max length
+        if (MaxLength > 0 && Text.Length + text.Length > MaxLength)
+        {
+            text = text.Substring(0, MaxLength - Text.Length);
+        }
+
+        // Insert committed text at cursor
+        var newText = Text.Insert(_cursorPosition, text);
+        var newPos = _cursorPosition + text.Length;
+        Text = newText;
+        _cursorPosition = newPos;
+
+        EnsureCursorVisible();
+        Invalidate();
+    }
+
+    /// <summary>
+    /// Called when IME pre-edit (composition) text changes.
+    /// </summary>
+    public void OnPreEditChanged(string preEditText, int cursorPosition)
+    {
+        _preEditText = preEditText ?? string.Empty;
+        _preEditCursorPosition = cursorPosition;
+        Invalidate();
+    }
+
+    /// <summary>
+    /// Called when IME pre-edit ends (cancelled or committed).
+    /// </summary>
+    public void OnPreEditEnded()
+    {
+        _preEditText = string.Empty;
+        _preEditCursorPosition = 0;
+        Invalidate();
+    }
+
+    #endregion
+
     /// <summary>
     /// Event raised when text changes.
     /// </summary>
@@ -622,6 +738,8 @@ public class SkiaEditor : SkiaView
     public SkiaEditor()
     {
         IsFocusable = true;
+        // Get IME service from factory
+        _inputMethodService = InputMethodServiceFactory.Instance;
     }
 
     private void OnTextPropertyChanged(string oldText, string newText)
@@ -855,15 +973,42 @@ public class SkiaEditor : SkiaView
                     }
                 }
 
-                canvas.DrawText(line, x, y, textPaint);
+                // Determine if pre-edit text should be displayed on this line
+                var (cursorLine, cursorCol) = GetLineColumn(_cursorPosition);
+                var displayLine = line;
+                var hasPreEditOnThisLine = !string.IsNullOrEmpty(_preEditText) && cursorLine == lineIndex;
+
+                if (hasPreEditOnThisLine)
+                {
+                    // Insert pre-edit text at cursor position within this line
+                    var insertPos = Math.Min(cursorCol, line.Length);
+                    displayLine = line.Insert(insertPos, _preEditText);
+                }
+
+                // Draw the text with font fallback for emoji/CJK support
+                DrawTextWithFallback(canvas, displayLine, x, y, textPaint, SKTypeface.Default);
+
+                // Draw underline for pre-edit (composition) text
+                if (hasPreEditOnThisLine)
+                {
+                    DrawPreEditUnderline(canvas, textPaint, line, x, y, contentRect);
+                }
 
                 // Draw cursor if on this line
                 if (IsFocused && _cursorVisible)
                 {
-                    var (cursorLine, cursorCol) = GetLineColumn(_cursorPosition);
                     if (cursorLine == lineIndex)
                     {
-                        var cursorX = x + MeasureText(line.Substring(0, Math.Min(cursorCol, line.Length)), font);
+                        // Account for pre-edit text when calculating cursor position
+                        var textToCursor = line.Substring(0, Math.Min(cursorCol, line.Length));
+                        var cursorX = x + MeasureText(textToCursor, font);
+
+                        // If there's pre-edit text, cursor goes after it
+                        if (hasPreEditOnThisLine && _preEditText.Length > 0)
+                        {
+                            cursorX += MeasureText(_preEditText, font);
+                        }
+
                         using var cursorPaint = new SKPaint
                         {
                             Color = ToSKColor(CursorColor),
@@ -1247,12 +1392,24 @@ public class SkiaEditor : SkiaView
     {
         base.OnFocusGained();
         SkiaVisualStateManager.GoToState(this, SkiaVisualStateManager.CommonStates.Focused);
+
+        // Connect to IME service
+        _inputMethodService?.SetFocus(this);
+
+        // Update cursor location for IME candidate window positioning
+        UpdateImeCursorLocation();
     }
 
     public override void OnFocusLost()
     {
         base.OnFocusLost();
         SkiaVisualStateManager.GoToState(this, SkiaVisualStateManager.CommonStates.Normal);
+
+        // Disconnect from IME service and reset any composition
+        _inputMethodService?.SetFocus(null);
+        _preEditText = string.Empty;
+        _preEditCursorPosition = 0;
+
         Completed?.Invoke(this, EventArgs.Empty);
     }
 
@@ -1340,6 +1497,91 @@ public class SkiaEditor : SkiaView
 
     #endregion
 
+    /// <summary>
+    /// Draws text with font fallback for emoji, CJK, and other scripts.
+    /// </summary>
+    private void DrawTextWithFallback(SKCanvas canvas, string text, float x, float y, SKPaint paint, SKTypeface preferredTypeface)
+    {
+        if (string.IsNullOrEmpty(text))
+        {
+            return;
+        }
+
+        // Use FontFallbackManager for mixed-script text
+        var runs = FontFallbackManager.Instance.ShapeTextWithFallback(text, preferredTypeface);
+
+        if (runs.Count <= 1)
+        {
+            // Single run or no fallback needed - draw directly
+            canvas.DrawText(text, x, y, paint);
+            return;
+        }
+
+        // Multiple runs with different fonts
+        float currentX = x;
+        foreach (var run in runs)
+        {
+            using var runFont = new SKFont(run.Typeface, (float)FontSize);
+            using var runPaint = new SKPaint(runFont)
+            {
+                Color = paint.Color,
+                IsAntialias = true
+            };
+
+            canvas.DrawText(run.Text, currentX, y, runPaint);
+            currentX += runPaint.MeasureText(run.Text);
+        }
+    }
+
+    /// <summary>
+    /// Draws underline for IME pre-edit (composition) text.
+    /// </summary>
+    private void DrawPreEditUnderline(SKCanvas canvas, SKPaint paint, string displayText, float x, float y, SKRect bounds)
+    {
+        // Calculate pre-edit text position
+        var textToCursor = displayText.Substring(0, Math.Min(_cursorPosition, displayText.Length));
+        var preEditStartX = x + paint.MeasureText(textToCursor);
+        var preEditEndX = preEditStartX + paint.MeasureText(_preEditText);
+
+        // Draw dotted underline to indicate composition
+        using var underlinePaint = new SKPaint
+        {
+            Color = paint.Color,
+            StrokeWidth = 1,
+            IsAntialias = true,
+            PathEffect = SKPathEffect.CreateDash(new float[] { 3, 2 }, 0)
+        };
+
+        var underlineY = y + 2;
+        canvas.DrawLine(preEditStartX, underlineY, preEditEndX, underlineY, underlinePaint);
+    }
+
+    /// <summary>
+    /// Updates the IME cursor location for candidate window positioning.
+    /// </summary>
+    private void UpdateImeCursorLocation()
+    {
+        if (_inputMethodService == null) return;
+
+        var screenBounds = ScreenBounds;
+        var (line, col) = GetLineColumn(_cursorPosition);
+        var fontSize = (float)FontSize;
+        var lineSpacing = fontSize * (float)LineHeight;
+
+        using var font = new SKFont(SKTypeface.Default, fontSize);
+        using var paint = new SKPaint(font);
+
+        var lineText = line < _lines.Count ? _lines[line] : "";
+        var textToCursor = lineText.Substring(0, Math.Min(col, lineText.Length));
+        var cursorX = paint.MeasureText(textToCursor);
+
+        int x = (int)(screenBounds.Left + Padding.Left + cursorX);
+        int y = (int)(screenBounds.Top + Padding.Top + line * lineSpacing - _scrollOffsetY);
+        int height = (int)fontSize;
+
+        _inputMethodService.SetCursorLocation(x, y, 2, height);
+    }
+
     protected override SKSize MeasureOverride(SKSize availableSize)
     {
         if (AutoSize)

Views/SkiaEntry.cs

@@ -13,8 +13,9 @@ namespace Microsoft.Maui.Platform;
 
 /// <summary>
 /// Skia-rendered text entry control with full XAML styling and data binding support.
+/// Implements IInputContext for IME (Input Method Editor) support.
 /// </summary>
-public class SkiaEntry : SkiaView
+public class SkiaEntry : SkiaView, IInputContext
 {
     #region BindableProperties
 
@@ -662,6 +663,11 @@ public class SkiaEntry : SkiaView
     private float _lastClickX;
     private const double DoubleClickThresholdMs = 400;
 
+    // IME (Input Method Editor) support
+    private string _preEditText = string.Empty;
+    private int _preEditCursorPosition;
+    private IInputMethodService? _inputMethodService;
+
     /// <summary>
     /// Event raised when text changes.
     /// </summary>
@@ -675,8 +681,96 @@ public class SkiaEntry : SkiaView
     public SkiaEntry()
     {
         IsFocusable = true;
+        // Get IME service from factory
+        _inputMethodService = InputMethodServiceFactory.Instance;
     }
 
+    #region IInputContext Implementation
+
+    /// <summary>
+    /// Gets or sets the text for IME context.
+    /// </summary>
+    string IInputContext.Text
+    {
+        get => Text;
+        set => Text = value;
+    }
+
+    /// <summary>
+    /// Gets or sets the cursor position for IME context.
+    /// </summary>
+    int IInputContext.CursorPosition
+    {
+        get => _cursorPosition;
+        set => CursorPosition = value;
+    }
+
+    /// <summary>
+    /// Gets the selection start for IME context.
+    /// </summary>
+    int IInputContext.SelectionStart => _selectionStart;
+
+    /// <summary>
+    /// Gets the selection length for IME context.
+    /// </summary>
+    int IInputContext.SelectionLength => _selectionLength;
+
+    /// <summary>
+    /// Called when IME commits text.
+    /// </summary>
+    public void OnTextCommitted(string text)
+    {
+        if (IsReadOnly) return;
+
+        // Delete selection if any
+        if (_selectionLength != 0)
+        {
+            DeleteSelection();
+        }
+
+        // Clear pre-edit text
+        _preEditText = string.Empty;
+        _preEditCursorPosition = 0;
+
+        // Check max length
+        if (MaxLength > 0 && Text.Length + text.Length > MaxLength)
+        {
+            text = text.Substring(0, MaxLength - Text.Length);
+        }
+
+        // Insert committed text at cursor
+        var newText = Text.Insert(_cursorPosition, text);
+        var newPos = _cursorPosition + text.Length;
+        Text = newText;
+        _cursorPosition = newPos;
+
+        ResetCursorBlink();
+        Invalidate();
+    }
+
+    /// <summary>
+    /// Called when IME pre-edit (composition) text changes.
+    /// </summary>
+    public void OnPreEditChanged(string preEditText, int cursorPosition)
+    {
+        _preEditText = preEditText ?? string.Empty;
+        _preEditCursorPosition = cursorPosition;
+        ResetCursorBlink();
+        Invalidate();
+    }
+
+    /// <summary>
+    /// Called when IME pre-edit ends (cancelled or committed).
+    /// </summary>
+    public void OnPreEditEnded()
+    {
+        _preEditText = string.Empty;
+        _preEditCursorPosition = 0;
+        Invalidate();
+    }
+
+    #endregion
+
     /// <summary>
     /// Converts a MAUI Color to SkiaSharp SKColor for rendering.
     /// </summary>
@@ -714,6 +808,30 @@ public class SkiaEntry : SkiaView
         return string.IsNullOrEmpty(FontFamily) ? "Sans" : FontFamily;
     }
 
+    /// <summary>
+    /// Determines if text should be rendered right-to-left based on FlowDirection.
+    /// </summary>
+    private bool IsRightToLeft()
+    {
+        return FlowDirection == FlowDirection.RightToLeft;
+    }
+
+    /// <summary>
+    /// Gets the horizontal alignment accounting for FlowDirection.
+    /// </summary>
+    private float GetEffectiveTextX(SKRect contentBounds, float textWidth)
+    {
+        bool isRtl = IsRightToLeft();
+
+        return HorizontalTextAlignment switch
+        {
+            TextAlignment.Start => isRtl ? contentBounds.Right - textWidth - _scrollOffset : contentBounds.Left - _scrollOffset,
+            TextAlignment.Center => contentBounds.MidX - textWidth / 2,
+            TextAlignment.End => isRtl ? contentBounds.Left - _scrollOffset : contentBounds.Right - textWidth - _scrollOffset,
+            _ => isRtl ? contentBounds.Right - textWidth - _scrollOffset : contentBounds.Left - _scrollOffset
+        };
+    }
+
     private void OnTextPropertyChanged(string oldText, string newText)
     {
         _cursorPosition = Math.Min(_cursorPosition, (newText ?? "").Length);
@@ -777,7 +895,12 @@ public class SkiaEntry : SkiaView
         using var paint = new SKPaint(font) { IsAntialias = true };
 
         var displayText = GetDisplayText();
-        var hasText = !string.IsNullOrEmpty(displayText);
+        // Append pre-edit text at cursor position for IME composition display
+        var preEditInsertPos = Math.Min(_cursorPosition, displayText.Length);
+        var displayTextWithPreEdit = string.IsNullOrEmpty(_preEditText)
+            ? displayText
+            : displayText.Insert(preEditInsertPos, _preEditText);
+        var hasText = !string.IsNullOrEmpty(displayTextWithPreEdit);
 
         if (hasText)
         {
@@ -815,7 +938,14 @@ public class SkiaEntry : SkiaView
                 _ => contentBounds.MidY - textBounds.MidY // Center
             };
 
-            canvas.DrawText(displayText, x, y, paint);
+            // Draw the text with font fallback for emoji/CJK support
+            DrawTextWithFallback(canvas, displayTextWithPreEdit, x, y, paint, typeface);
+
+            // Draw underline for pre-edit (composition) text
+            if (!string.IsNullOrEmpty(_preEditText))
+            {
+                DrawPreEditUnderline(canvas, paint, displayText, x, y, contentBounds);
+            }
 
             // Draw cursor
             if (IsFocused && !IsReadOnly && _cursorVisible)
@@ -953,6 +1083,65 @@ public class SkiaEntry : SkiaView
         canvas.DrawLine(cursorX, bounds.Top + 2, cursorX, bounds.Bottom - 2, cursorPaint);
     }
 
+    /// <summary>
+    /// Draws text with font fallback for emoji, CJK, and other scripts.
+    /// </summary>
+    private void DrawTextWithFallback(SKCanvas canvas, string text, float x, float y, SKPaint paint, SKTypeface preferredTypeface)
+    {
+        if (string.IsNullOrEmpty(text))
+        {
+            return;
+        }
+
+        // Use FontFallbackManager for mixed-script text
+        var runs = FontFallbackManager.Instance.ShapeTextWithFallback(text, preferredTypeface);
+
+        if (runs.Count <= 1)
+        {
+            // Single run or no fallback needed - draw directly
+            canvas.DrawText(text, x, y, paint);
+            return;
+        }
+
+        // Multiple runs with different fonts
+        float currentX = x;
+        foreach (var run in runs)
+        {
+            using var runFont = new SKFont(run.Typeface, (float)FontSize);
+            using var runPaint = new SKPaint(runFont)
+            {
+                Color = paint.Color,
+                IsAntialias = true
+            };
+
+            canvas.DrawText(run.Text, currentX, y, runPaint);
+            currentX += runPaint.MeasureText(run.Text);
+        }
+    }
+
+    /// <summary>
+    /// Draws underline for IME pre-edit (composition) text.
+    /// </summary>
+    private void DrawPreEditUnderline(SKCanvas canvas, SKPaint paint, string displayText, float x, float y, SKRect bounds)
+    {
+        // Calculate pre-edit text position
+        var textToCursor = displayText.Substring(0, Math.Min(_cursorPosition, displayText.Length));
+        var preEditStartX = x + paint.MeasureText(textToCursor);
+        var preEditEndX = preEditStartX + paint.MeasureText(_preEditText);
+
+        // Draw dotted underline to indicate composition
+        using var underlinePaint = new SKPaint
+        {
+            Color = paint.Color,
+            StrokeWidth = 1,
+            IsAntialias = true,
+            PathEffect = SKPathEffect.CreateDash(new float[] { 3, 2 }, 0)
+        };
+
+        var underlineY = y + 2;
+        canvas.DrawLine(preEditStartX, underlineY, preEditEndX, underlineY, underlinePaint);
+    }
+
     private void ResetCursorBlink()
     {
         _cursorBlinkTime = DateTime.UtcNow;
@@ -1445,12 +1634,49 @@ public class SkiaEntry : SkiaView
     {
         base.OnFocusGained();
         SkiaVisualStateManager.GoToState(this, SkiaVisualStateManager.CommonStates.Focused);
+
+        // Connect to IME service
+        _inputMethodService?.SetFocus(this);
+
+        // Update cursor location for IME candidate window positioning
+        UpdateImeCursorLocation();
     }
 
     public override void OnFocusLost()
     {
         base.OnFocusLost();
         SkiaVisualStateManager.GoToState(this, SkiaVisualStateManager.CommonStates.Normal);
+
+        // Disconnect from IME service and reset any composition
+        _inputMethodService?.SetFocus(null);
+        _preEditText = string.Empty;
+        _preEditCursorPosition = 0;
+    }
+
+    /// <summary>
+    /// Updates the IME cursor location for candidate window positioning.
+    /// </summary>
+    private void UpdateImeCursorLocation()
+    {
+        if (_inputMethodService == null) return;
+
+        var screenBounds = ScreenBounds;
+        var fontStyle = GetFontStyle();
+        var typeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(GetEffectiveFontFamily(), fontStyle)
+                      ?? SKTypeface.Default;
+
+        using var font = new SKFont(typeface, (float)FontSize);
+        using var paint = new SKPaint(font);
+
+        var displayText = GetDisplayText();
+        var textToCursor = displayText.Substring(0, Math.Min(_cursorPosition, displayText.Length));
+        var cursorX = paint.MeasureText(textToCursor);
+
+        int x = (int)(screenBounds.Left + Padding.Left - _scrollOffset + cursorX);
+        int y = (int)(screenBounds.Top + Padding.Top);
+        int height = (int)FontSize;
+
+        _inputMethodService.SetCursorLocation(x, y, 2, height);
     }
 
     protected override SKSize MeasureOverride(SKSize availableSize)

Views/SkiaLabel.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using Microsoft.Maui.Controls;
 using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Platform.Linux.Rendering;
+using Microsoft.Maui.Platform.Linux.Services;
 using SkiaSharp;
 
 namespace Microsoft.Maui.Platform;
@@ -645,6 +646,31 @@ public class SkiaLabel : SkiaView
             isItalic ? SKFontStyleSlant.Italic : SKFontStyleSlant.Upright);
     }
 
+    /// <summary>
+    /// Determines if text should be rendered right-to-left based on FlowDirection.
+    /// </summary>
+    private bool IsRightToLeft()
+    {
+        return FlowDirection == FlowDirection.RightToLeft;
+    }
+
+    /// <summary>
+    /// Gets the effective horizontal alignment for the given alignment,
+    /// accounting for FlowDirection (RTL flips Start/End).
+    /// </summary>
+    private float GetHorizontalPosition(TextAlignment alignment, float boundsLeft, float boundsRight, float textWidth)
+    {
+        bool isRtl = IsRightToLeft();
+
+        return alignment switch
+        {
+            TextAlignment.Start => isRtl ? boundsRight - textWidth : boundsLeft,
+            TextAlignment.Center => (boundsLeft + boundsRight) / 2 - textWidth / 2,
+            TextAlignment.End => isRtl ? boundsLeft : boundsRight - textWidth,
+            _ => isRtl ? boundsRight - textWidth : boundsLeft
+        };
+    }
+
     #endregion
 
     #region Drawing
@@ -719,14 +745,8 @@ public class SkiaLabel : SkiaView
             textWidth += (float)(CharacterSpacing * (displayText.Length - 1));
         }
 
-        // Calculate position based on alignment
-        float x = HorizontalTextAlignment switch
-        {
-            TextAlignment.Start => bounds.Left,
-            TextAlignment.Center => bounds.MidX - textWidth / 2,
-            TextAlignment.End => bounds.Right - textWidth,
-            _ => bounds.Left
-        };
+        // Calculate position based on alignment and FlowDirection
+        float x = GetHorizontalPosition(HorizontalTextAlignment, bounds.Left, bounds.Right, textWidth);
 
         float y = VerticalTextAlignment switch
         {
@@ -804,13 +824,8 @@ public class SkiaLabel : SkiaView
                 textWidth += (float)(CharacterSpacing * (line.Length - 1));
             }
 
-            float x = HorizontalTextAlignment switch
-            {
-                TextAlignment.Start => bounds.Left,
-                TextAlignment.Center => bounds.MidX - textWidth / 2,
-                TextAlignment.End => bounds.Right - textWidth,
-                _ => bounds.Left
-            };
+            // Use FlowDirection-aware positioning
+            float x = GetHorizontalPosition(HorizontalTextAlignment, bounds.Left, bounds.Right, textWidth);
 
             float textY = y - textBounds.Top;
             DrawTextWithSpacing(canvas, line, x, textY, paint);
@@ -823,18 +838,118 @@ public class SkiaLabel : SkiaView
 
     private void DrawTextWithSpacing(SKCanvas canvas, string text, float x, float y, SKPaint paint)
     {
-        if (CharacterSpacing == 0 || string.IsNullOrEmpty(text) || text.Length <= 1)
+        if (string.IsNullOrEmpty(text)) return;
+
+        // Get the preferred typeface from the current paint
+        var fontFamily = string.IsNullOrEmpty(FontFamily) ? "Sans" : FontFamily;
+        var preferredTypeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(fontFamily, GetFontStyle())
+                               ?? SKTypeface.Default;
+
+        if (CharacterSpacing == 0 || text.Length <= 1)
         {
+            // No character spacing - use font fallback for the whole string
+            DrawTextWithFallback(canvas, text, x, y, paint, preferredTypeface);
+            return;
+        }
+
+        // With character spacing, we need to draw character by character with fallback
+        float currentX = x;
+        float fontSize = FontSize > 0 ? (float)FontSize : 14f;
+
+        // Use font fallback to get runs for proper glyph coverage
+        var runs = FontFallbackManager.Instance.ShapeTextWithFallback(text, preferredTypeface);
+
+        foreach (var run in runs)
+        {
+            // Draw each character in the run with spacing
+            foreach (char c in run.Text)
+            {
+                string charStr = c.ToString();
+                using var charFont = new SKFont(run.Typeface, fontSize);
+                using var charPaint = new SKPaint(charFont)
+                {
+                    Color = paint.Color,
+                    IsAntialias = true
+                };
+
+                canvas.DrawText(charStr, currentX, y, charPaint);
+                currentX += charPaint.MeasureText(charStr) + (float)CharacterSpacing;
+            }
+        }
+    }
+
+    /// <summary>
+    /// Draws text with font fallback for emoji, CJK, and other scripts.
+    /// </summary>
+    private void DrawTextWithFallback(SKCanvas canvas, string text, float x, float y, SKPaint paint, SKTypeface preferredTypeface)
+    {
+        if (string.IsNullOrEmpty(text))
+        {
+            return;
+        }
+
+        // Use FontFallbackManager for mixed-script text
+        var runs = FontFallbackManager.Instance.ShapeTextWithFallback(text, preferredTypeface);
+
+        if (runs.Count <= 1)
+        {
+            // Single run or no fallback needed - draw directly
             canvas.DrawText(text, x, y, paint);
             return;
         }
 
+        // Multiple runs with different fonts
+        float fontSize = FontSize > 0 ? (float)FontSize : 14f;
         float currentX = x;
-        foreach (char c in text)
+
+        foreach (var run in runs)
         {
-            string charStr = c.ToString();
-            canvas.DrawText(charStr, currentX, y, paint);
-            currentX += paint.MeasureText(charStr) + (float)CharacterSpacing;
+            using var runFont = new SKFont(run.Typeface, fontSize);
+            using var runPaint = new SKPaint(runFont)
+            {
+                Color = paint.Color,
+                IsAntialias = true
+            };
+
+            canvas.DrawText(run.Text, currentX, y, runPaint);
+            currentX += runPaint.MeasureText(run.Text);
+        }
+    }
+
+    /// <summary>
+    /// Draws formatted span text with font fallback for emoji, CJK, and other scripts.
+    /// </summary>
+    private void DrawFormattedSpanWithFallback(SKCanvas canvas, string text, float x, float y, SKPaint paint, SKTypeface preferredTypeface, float fontSize)
+    {
+        if (string.IsNullOrEmpty(text))
+        {
+            return;
+        }
+
+        // Use FontFallbackManager for mixed-script text
+        var runs = FontFallbackManager.Instance.ShapeTextWithFallback(text, preferredTypeface);
+
+        if (runs.Count <= 1)
+        {
+            // Single run or no fallback needed - draw directly
+            canvas.DrawText(text, x, y, paint);
+            return;
+        }
+
+        // Multiple runs with different fonts
+        float currentX = x;
+
+        foreach (var run in runs)
+        {
+            using var runFont = new SKFont(run.Typeface, fontSize);
+            using var runPaint = new SKPaint(runFont)
+            {
+                Color = paint.Color,
+                IsAntialias = true
+            };
+
+            canvas.DrawText(run.Text, currentX, y, runPaint);
+            currentX += runPaint.MeasureText(run.Text);
         }
     }
 
@@ -926,7 +1041,10 @@ public class SkiaLabel : SkiaView
                 y += lineHeight;
             }
 
-            canvas.DrawText(span.Text, x, y, paint);
+            // Use font fallback for this span
+            var preferredTypeface = SkiaRenderingEngine.Current?.ResourceCache.GetTypeface(spanFontFamily, fontStyle)
+                                   ?? SKTypeface.Default;
+            DrawFormattedSpanWithFallback(canvas, span.Text, x, y, paint, preferredTypeface, spanFontSize);
 
             // Draw span decorations
             if (span.TextDecorations != TextDecorations.None)

Views/SkiaView.cs

@@ -6,6 +6,7 @@ using Microsoft.Maui.Controls.Shapes;
 using Microsoft.Maui.Platform.Linux;
 using Microsoft.Maui.Platform.Linux.Handlers;
 using Microsoft.Maui.Platform.Linux.Rendering;
+using Microsoft.Maui.Platform.Linux.Services;
 using Microsoft.Maui.Platform.Linux.Window;
 using SkiaSharp;
 
@@ -14,8 +15,9 @@ namespace Microsoft.Maui.Platform;
 /// <summary>
 /// Base class for all Skia-rendered views on Linux.
 /// Inherits from BindableObject to enable XAML styling, data binding, and Visual State Manager.
+/// Implements IAccessible for screen reader support.
 /// </summary>
-public abstract class SkiaView : BindableObject, IDisposable
+public abstract class SkiaView : BindableObject, IDisposable, IAccessible
 {
     // Popup overlay system for dropdowns, calendars, etc.
     private static readonly List<(SkiaView Owner, Action<SKCanvas> Draw)> _popupOverlays = new();
@@ -80,6 +82,243 @@ public abstract class SkiaView : BindableObject, IDisposable
         return Bounds.Contains(x, y);
     }
 
+    #region High Contrast Support
+
+    private static HighContrastService? _highContrastService;
+    private static bool _highContrastInitialized;
+
+    /// <summary>
+    /// Gets whether high contrast mode is enabled.
+    /// </summary>
+    public static bool IsHighContrastEnabled => _highContrastService?.IsHighContrastEnabled ?? false;
+
+    /// <summary>
+    /// Gets the current high contrast colors, or default colors if not in high contrast mode.
+    /// </summary>
+    public static HighContrastColors GetHighContrastColors()
+    {
+        InitializeHighContrastService();
+        return _highContrastService?.GetColors() ?? new HighContrastColors
+        {
+            Background = SKColors.White,
+            Foreground = new SKColor(33, 33, 33),
+            Accent = new SKColor(33, 150, 243),
+            Border = new SKColor(200, 200, 200),
+            Error = new SKColor(244, 67, 54),
+            Success = new SKColor(76, 175, 80),
+            Warning = new SKColor(255, 152, 0),
+            Link = new SKColor(33, 150, 243),
+            LinkVisited = new SKColor(156, 39, 176),
+            Selection = new SKColor(33, 150, 243),
+            SelectionText = SKColors.White,
+            DisabledText = new SKColor(158, 158, 158),
+            DisabledBackground = new SKColor(238, 238, 238)
+        };
+    }
+
+    private static void InitializeHighContrastService()
+    {
+        if (_highContrastInitialized) return;
+        _highContrastInitialized = true;
+
+        try
+        {
+            _highContrastService = new HighContrastService();
+            _highContrastService.HighContrastChanged += OnHighContrastChanged;
+            _highContrastService.Initialize();
+        }
+        catch
+        {
+            // Ignore errors - high contrast is optional
+        }
+    }
+
+    private static void OnHighContrastChanged(object? sender, HighContrastChangedEventArgs e)
+    {
+        // Request a full repaint of the UI
+        SkiaRenderingEngine.Current?.InvalidateAll();
+    }
+
+    #endregion
+
+    #region Accessibility Support (IAccessible)
+
+    private static IAccessibilityService? _accessibilityService;
+    private static bool _accessibilityInitialized;
+    private string _accessibleId = Guid.NewGuid().ToString();
+    private List<IAccessible>? _accessibleChildren;
+
+    /// <summary>
+    /// Gets or sets the accessibility name for screen readers.
+    /// </summary>
+    public string? SemanticName { get; set; }
+
+    /// <summary>
+    /// Gets or sets the accessibility description for screen readers.
+    /// </summary>
+    public string? SemanticDescription { get; set; }
+
+    /// <summary>
+    /// Gets or sets the accessibility hint for screen readers.
+    /// </summary>
+    public string? SemanticHint { get; set; }
+
+    /// <summary>
+    /// Gets the accessibility service instance.
+    /// </summary>
+    protected static IAccessibilityService? AccessibilityService
+    {
+        get
+        {
+            InitializeAccessibilityService();
+            return _accessibilityService;
+        }
+    }
+
+    private static void InitializeAccessibilityService()
+    {
+        if (_accessibilityInitialized) return;
+        _accessibilityInitialized = true;
+
+        try
+        {
+            _accessibilityService = AccessibilityServiceFactory.Instance;
+            _accessibilityService?.Initialize();
+        }
+        catch
+        {
+            // Ignore errors - accessibility is optional
+        }
+    }
+
+    /// <summary>
+    /// Registers this view with the accessibility service.
+    /// </summary>
+    protected void RegisterAccessibility()
+    {
+        AccessibilityService?.Register(this);
+    }
+
+    /// <summary>
+    /// Unregisters this view from the accessibility service.
+    /// </summary>
+    protected void UnregisterAccessibility()
+    {
+        AccessibilityService?.Unregister(this);
+    }
+
+    /// <summary>
+    /// Announces text to screen readers.
+    /// </summary>
+    protected void AnnounceToScreenReader(string text, AnnouncementPriority priority = AnnouncementPriority.Polite)
+    {
+        AccessibilityService?.Announce(text, priority);
+    }
+
+    // IAccessible implementation
+    string IAccessible.AccessibleId => _accessibleId;
+
+    string IAccessible.AccessibleName => SemanticName ?? GetDefaultAccessibleName();
+
+    string IAccessible.AccessibleDescription => SemanticDescription ?? SemanticHint ?? string.Empty;
+
+    AccessibleRole IAccessible.Role => GetAccessibleRole();
+
+    AccessibleStates IAccessible.States => GetAccessibleStates();
+
+    IAccessible? IAccessible.Parent => Parent as IAccessible;
+
+    IReadOnlyList<IAccessible> IAccessible.Children => _accessibleChildren ??= GetAccessibleChildren();
+
+    AccessibleRect IAccessible.Bounds => new AccessibleRect(
+        (int)ScreenBounds.Left,
+        (int)ScreenBounds.Top,
+        (int)ScreenBounds.Width,
+        (int)ScreenBounds.Height);
+
+    IReadOnlyList<AccessibleAction> IAccessible.Actions => GetAccessibleActions();
+
+    double? IAccessible.Value => GetAccessibleValue();
+    double? IAccessible.MinValue => GetAccessibleMinValue();
+    double? IAccessible.MaxValue => GetAccessibleMaxValue();
+
+    bool IAccessible.DoAction(string actionName) => DoAccessibleAction(actionName);
+    bool IAccessible.SetValue(double value) => SetAccessibleValue(value);
+
+    /// <summary>
+    /// Gets the default accessible name based on view content.
+    /// </summary>
+    protected virtual string GetDefaultAccessibleName() => string.Empty;
+
+    /// <summary>
+    /// Gets the accessible role for this view.
+    /// </summary>
+    protected virtual AccessibleRole GetAccessibleRole() => AccessibleRole.Unknown;
+
+    /// <summary>
+    /// Gets the current accessible states.
+    /// </summary>
+    protected virtual AccessibleStates GetAccessibleStates()
+    {
+        var states = AccessibleStates.None;
+        if (IsVisible) states |= AccessibleStates.Visible;
+        if (IsEnabled) states |= AccessibleStates.Enabled;
+        if (IsFocused) states |= AccessibleStates.Focused;
+        if (IsFocusable) states |= AccessibleStates.Focusable;
+        return states;
+    }
+
+    /// <summary>
+    /// Gets the accessible children of this view.
+    /// </summary>
+    protected virtual List<IAccessible> GetAccessibleChildren()
+    {
+        var children = new List<IAccessible>();
+        foreach (var child in Children)
+        {
+            if (child is IAccessible accessible)
+            {
+                children.Add(accessible);
+            }
+        }
+        return children;
+    }
+
+    /// <summary>
+    /// Gets the available accessible actions.
+    /// </summary>
+    protected virtual IReadOnlyList<AccessibleAction> GetAccessibleActions()
+    {
+        return Array.Empty<AccessibleAction>();
+    }
+
+    /// <summary>
+    /// Performs an accessible action.
+    /// </summary>
+    protected virtual bool DoAccessibleAction(string actionName) => false;
+
+    /// <summary>
+    /// Gets the accessible value (for sliders, progress bars, etc.).
+    /// </summary>
+    protected virtual double? GetAccessibleValue() => null;
+
+    /// <summary>
+    /// Gets the minimum accessible value.
+    /// </summary>
+    protected virtual double? GetAccessibleMinValue() => null;
+
+    /// <summary>
+    /// Gets the maximum accessible value.
+    /// </summary>
+    protected virtual double? GetAccessibleMaxValue() => null;
+
+    /// <summary>
+    /// Sets the accessible value.
+    /// </summary>
+    protected virtual bool SetAccessibleValue(double value) => false;
+
+    #endregion
+
     #region BindableProperties
 
     /// <summary>