Initial Chrome support

KeyLayoutAutoSwitch/Chrome.cs

@@ -0,0 +1,34 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows.Forms;
+using Accessibility;
+using CommandLine;
+
+namespace KeyLayoutAutoSwitch
+{
+	internal class Chrome : Browser
+	{
+		public override FocusType GetFocusType(IAccessible accessibleObject, out string url)
+		{
+			url = null;
+
+			// Walk up tree finding parent
+			var parent = accessibleObject;
+			while (parent != null)
+			{
+				var role = AccessibleObjectHelper.GetRole(parent);
+				if (role == AccessibleRole.Document && AccessibleObjectHelper.HasState(accessibleObject, AccessibleStates.Focusable))
+				{
+					// This is a web page
+					url = AccessibleObjectHelper.GetValue(parent);
+					return FocusType.Page;
+				}
+
+				parent = parent.accParent as IAccessible;
+			}
+
+			return FocusType.Other;
+		}
+	}
+}

KeyLayoutAutoSwitch/ChromeWidgets.cs

@@ -0,0 +1,45 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows.Forms;
+using Accessibility;
+using CommandLine;
+
+namespace KeyLayoutAutoSwitch
+{
+	internal class ChromeWidgets : Browser
+	{
+		public override FocusType GetFocusType(IAccessible accessibleObject, out string url)
+		{
+			url = null;
+
+			// Walk up tree finding parent
+			var parent = accessibleObject;
+			while (parent != null)
+			{
+				var role = AccessibleObjectHelper.GetRole(parent);
+				if (role == AccessibleRole.Text && AccessibleObjectHelper.HasState(accessibleObject, AccessibleStates.Focusable))
+				{
+					// Could be the location bar, if the parent is a grouping
+					if (accessibleObject.accParent is IAccessible immediateParent)
+					{
+						if (AccessibleObjectHelper.GetRole(immediateParent) == AccessibleRole.Grouping && (AccessibleStates)immediateParent.accState[0] == AccessibleStates.None)
+						{
+							return FocusType.Location;
+						}
+						else
+						{
+							if (AccessibleObjectHelper.FindAncestor(immediateParent, AccessibleRole.Dialog) != null)
+							{
+								return FocusType.FindInPage;
+							}
+						}
+					}
+				}
+				parent = parent.accParent as IAccessible;
+			}
+
+			return FocusType.Other;
+		}
+	}
+}

KeyLayoutAutoSwitch/KeyLayoutAutoSwitch.csproj

@@ -55,7 +55,9 @@
   <ItemGroup>
     <Compile Include="AccessibleObjectHelper.cs" />
     <Compile Include="Browser.cs" />
+    <Compile Include="ChromeWidgets.cs" />
     <Compile Include="ExtensionMethods.cs" />
+    <Compile Include="Chrome.cs" />
     <Compile Include="GlobalSuppressions.cs" />
     <Compile Include="PreviouslyVisitedPageRuleEditor.cs">
       <SubType>Form</SubType>

KeyLayoutAutoSwitch/Program.cs

@@ -241,12 +241,20 @@ private void OnFocusChanged(IntPtr hwnd, uint idObject, uint idChild)
 		{
 			var className = NativeMethods.GetWindowClassName(hwnd);
 
-			//Debug.WriteLine($"Focus changed to window: {hwnd} ({className}), object {idObject}, child {idChild}, layout {NativeMethods.GetKeyboardLayout(hwnd)}");
+			Debug.WriteLine($"Focus changed to window: {hwnd} ({className}), object {idObject}, child {idChild}, layout {NativeMethods.GetKeyboardLayout(hwnd)}");
 
 			Browser browser = null;
-			if (className == "MozillaWindowClass")
+			switch (className)
 			{
-				browser = new Firefox();
+				case "MozillaWindowClass":
+					browser = new Firefox();
+					break;
+				case "Chrome_RenderWidgetHostHWND":
+					browser = new Chrome();
+					break;
+				case "Chrome_WidgetWin_1":
+					browser = new ChromeWidgets();
+					break;
 			}
 			if (browser != null)
 			{