仿真平台内核初版 -tlib库 包含<sparc arm riscv powerPC>

lib/termsharp/xwt/Xwt.Gtk.Mac/GtkMacAccessibleBackend.cs

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+//
+// GtkMacAccessibleBackend.cs
+//
+// Author:
+//       iain holmes <iaholmes@microsoft.com>
+//
+// Copyright (c) Microsoft, Inc 2017 
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+using System;
+using System.Linq;
+using AppKit;
+using CoreGraphics;
+using Foundation;
+using ObjCRuntime;
+using Xwt.Accessibility;
+using Xwt.GtkBackend;
+using GtkWidget = Gtk.Widget;
+
+namespace Xwt.Gtk.Mac
+{
+	public partial class GtkMacAccessibleBackend : AccessibleBackend
+	{
+		public GtkMacAccessibleBackend ()
+		{
+		}
+
+		const string XamarinPrivateAtkCocoaNSAccessibilityKey = "xamarin-private-atkcocoa-nsaccessibility";
+		internal static INSAccessibility GetNSAccessibilityElement (GLib.Object o)
+		{
+			IntPtr handle = GtkWorkarounds.GetData (o, XamarinPrivateAtkCocoaNSAccessibilityKey);
+
+			// The object returned could either be an NSAccessibilityElement or it might be an NSObject that implements INSAccessibility
+			return Runtime.GetNSObject<NSObject> (handle, false) as INSAccessibility;
+		}
+
+		public override bool IsAccessible {
+			get {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return false;
+				}
+				return nsa.AccessibilityElement;
+			}
+			set {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return;
+				}
+				nsa.AccessibilityElement = value;
+			}
+		}
+
+		public override string Label {
+			get {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return null;
+				}
+				return nsa.AccessibilityLabel;
+			}
+			set {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return;
+				}
+				nsa.AccessibilityLabel = value;
+			}
+		}
+
+		public override string RoleDescription {
+			get {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return null;
+				}
+				return nsa.AccessibilityRoleDescription;
+			}
+			set {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return;
+				}
+				nsa.AccessibilityRoleDescription = value;
+			}
+		}
+
+		public override string Title {
+			get {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return null;
+				}
+				return nsa.AccessibilityTitle;
+			}
+			set {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return;
+				}
+				nsa.AccessibilityTitle = value;
+			}
+		}
+
+		public override Widget LabelWidget
+		{
+			set
+			{
+				var nsa = GetNSAccessibilityElement(widget.Accessible);
+				if (nsa == null)
+					return;
+
+				NSObject lnsa = null;
+				var label = value?.Surface?.NativeWidget;
+				if (label is NSObject)
+					lnsa = (NSObject)label;
+				else if (label is GtkWidget) {
+					lnsa = GetNSAccessibilityElement(((GtkWidget)label).Accessible) as NSObject;
+				}
+
+				nsa.AccessibilityTitleUIElement = lnsa;
+			}
+		}
+
+		public override Uri Uri {
+			get {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return null;
+				}
+
+				var url = nsa.AccessibilityUrl;
+				return new Uri (url.AbsoluteString);
+			}
+			set {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return;
+				}
+
+				nsa.AccessibilityUrl = new NSUrl (value.AbsoluteUri);
+			}
+		}
+
+		public override Rectangle Bounds {
+			get {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return Rectangle.Zero;
+				}
+				var r = nsa.AccessibilityFrame;
+				return new Rectangle (r.X, r.Y, r.Width, r.Height);
+			}
+			set {
+				var nsa = GetNSAccessibilityElement (widget.Accessible);
+				if (nsa == null) {
+					return;
+				}
+				nsa.AccessibilityFrame = new CGRect ((nfloat)value.X, (nfloat)value.Y, (nfloat)value.Width, (nfloat)value.Height); ;
+			}
+		}
+
+		public override void AddChild (object nativeChild)
+		{
+			var nsa = GetNSAccessibilityElement (widget.Accessible);
+			if (nsa == null) {
+				return;
+			}
+
+			var parent = nsa as NSAccessibilityElement;
+			if (parent != null) {
+				var child = nativeChild as NSAccessibilityElement;
+				if (child == null) {
+					throw new ArgumentException ($"{nativeChild.GetType ().ToString ()} - should be NSAccessibilityElement", nameof (nativeChild));
+				}
+				parent.AccessibilityAddChildElement (child);
+			}
+		}
+
+		public override void RemoveChild (object nativeChild)
+		{
+			var nsa = GetNSAccessibilityElement (widget.Accessible);
+			if (nsa == null) {
+				return;
+			}
+
+			var parent = nsa as NSAccessibilityElement;
+
+			if (parent != null) {
+				parent.AccessibilityChildren = parent.AccessibilityChildren.Where(c => c != nativeChild).ToArray ();
+			}
+		}
+
+		public override void RemoveAllChildren ()
+		{
+			var nsa = GetNSAccessibilityElement (widget.Accessible);
+			if (nsa == null) {
+				return;
+			}
+
+			nsa.AccessibilityChildren = null;
+		}
+	}
+}