Make mono stuff work (kinda) again.

Cairo/Perspex.Cairo/CairoExtensions.cs

@@ -24,5 +24,14 @@ namespace Perspex.Cairo
         {
             return new Cairo.Rectangle(rect.X, rect.Y, rect.Width, rect.Height);
         }
+
+        public static Rect ToPerspex(this Pango.Rectangle rect)
+        {
+            return new Rect(
+                Pango.Units.ToDouble(rect.X),
+                Pango.Units.ToDouble(rect.Y),
+                Pango.Units.ToDouble(rect.Width),
+                Pango.Units.ToDouble(rect.Height));
+        }
     }
 }

Cairo/Perspex.Cairo/CairoPlatform.cs

@@ -10,6 +10,7 @@ namespace Perspex.Cairo
     using global::Cairo;
     using Perspex.Cairo.Media;
     using Perspex.Cairo.Media.Imaging;
+    using Perspex.Media;
     using Perspex.Platform;
     using Perspex.Threading;
     using Splat;
@@ -30,8 +31,18 @@ namespace Perspex.Cairo
             ////return new BitmapImpl(imagingFactory, width, height);
         }
 
+        public IFormattedTextImpl CreateFormattedText(
+            string text, 
+            string fontFamily, 
+            double fontSize, 
+            FontStyle fontStyle)
+        {
+            return new FormattedTextImpl(text, fontFamily, fontSize, fontStyle);
+        }
+
         public IRenderer CreateRenderer(IPlatformHandle handle, double width, double height)
         {
+            Locator.CurrentMutable.RegisterConstant(this.GetPangoContext(handle), typeof(Pango.Context));
             return new Renderer(handle, width, height);
         }
 

Cairo/Perspex.Cairo/Media/DrawingContext.cs

@@ -133,14 +133,14 @@ namespace Perspex.Cairo.Media
         /// Draws text.
         /// </summary>
         /// <param name="foreground">The foreground brush.</param>
-        /// <param name="rect">The output rectangle.</param>
+        /// <param name="origin">The upper-left corner of the text.</param>
         /// <param name="text">The text.</param>
-        public void DrawText(Perspex.Media.Brush foreground, Rect rect, FormattedText text)
+        public void DrawText(Brush foreground, Point origin, FormattedText text)
         {
-            ////var layout = this.textService.CreateLayout(text);
-            ////this.SetBrush(foreground);
-            ////this.context.MoveTo(rect.X, rect.Y);
-            ////Pango.CairoHelper.ShowLayout(this.context, layout);
+            var layout = ((FormattedTextImpl)text.PlatformImpl).Layout;
+            this.SetBrush(foreground);
+            this.context.MoveTo(origin.X, origin.Y);
+            Pango.CairoHelper.ShowLayout(this.context, layout);
         }
 
         /// <summary>

Cairo/Perspex.Cairo/Media/FormattedTextImpl.cs

@@ -0,0 +1,97 @@
+// -----------------------------------------------------------------------
+// <copyright file="TextService.cs" company="Steven Kirk">
+// Copyright 2014 MIT Licence. See licence.md for more information.
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace Perspex.Cairo.Media
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+    using Perspex.Media;
+    using Perspex.Platform;
+    using Splat;
+
+    public class FormattedTextImpl : IFormattedTextImpl
+    {
+        public FormattedTextImpl(
+            string text,
+            string fontFamily,
+            double fontSize,
+            FontStyle fontStyle)
+        {
+            var context = Locator.Current.GetService<Pango.Context>();
+            this.Layout = new Pango.Layout(context);
+            this.Layout.SetText(text);
+            this.Layout.FontDescription = new Pango.FontDescription
+            {
+                Family = fontFamily,
+                Size = Pango.Units.FromDouble(fontSize),
+                Style = (Pango.Style)fontStyle,
+            };
+        }
+
+        public Size Constraint
+        {
+            get
+            {
+                return new Size(this.Layout.Width, double.PositiveInfinity);
+            }
+
+            set
+            {
+                this.Layout.Width = Pango.Units.FromDouble(value.Width);
+            }
+        }
+
+        public Pango.Layout Layout
+        {
+            get;
+            private set;
+        }
+
+        public void Dispose()
+        {
+            this.Layout.Dispose();
+        }
+
+        public TextHitTestResult HitTestPoint(Point point)
+        {
+            int textPosition;
+            int trailing;
+
+            var isInside = this.Layout.XyToIndex(
+                Pango.Units.FromDouble(point.X),
+                Pango.Units.FromDouble(point.Y),
+                out textPosition,
+                out trailing);
+
+            return new TextHitTestResult
+            {
+                IsInside = isInside,
+                TextPosition = textPosition,
+                IsTrailing = trailing == 0,
+            };
+        }
+
+        public Rect HitTestTextPosition(int index)
+        {
+            return this.Layout.IndexToPos(index).ToPerspex();
+        }
+
+        public IEnumerable<Rect> HitTestTextRange(int index, int length, Point origin)
+        {
+            // TODO: Implement.
+            return new Rect[0];
+        }
+
+        public Size Measure()
+        {
+            int width;
+            int height;
+            this.Layout.GetPixelSize(out width, out height);
+            return new Size(width, height);
+        }
+    }
+}

Cairo/Perspex.Cairo/Perspex.Cairo.csproj

@@ -67,6 +67,7 @@
   <ItemGroup>
     <Compile Include="CairoPlatform.cs" />
     <Compile Include="Media\DrawingContext.cs" />
+    <Compile Include="Media\FormattedTextImpl.cs" />
     <Compile Include="Media\Imaging\BitmapImpl.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Renderer.cs" />

Gtk/Perspex.Gtk/Input/GtkKeyboardDevice.cs

@@ -29,7 +29,11 @@ namespace Perspex.Gtk
 
         public override ModifierKeys Modifiers
         {
-            get { throw new System.NotImplementedException(); }
+            get
+            {
+                // TODO: Implement.
+                return ModifierKeys.None;
+            }
         }
 
         public static Perspex.Input.Key ConvertKey(Gdk.Key key)

Perspex.SceneGraph/Media/TextHitTestResult.cs

@@ -8,6 +8,8 @@ namespace Perspex.Media
 {
     public class TextHitTestResult
     {
+        public bool IsInside { get; set; }
+
         public int TextPosition { get; set; }
 
         public bool IsTrailing { get; set; }

Windows/Perspex.Direct2D1/Media/FormattedTextImpl.cs

@@ -70,6 +70,7 @@ namespace Perspex.Direct2D1.Media
 
             return new TextHitTestResult
             {
+                IsInside = isInside,
                 TextPosition = result.TextPosition,
                 IsTrailing = isTrailingHit,
             };