Implemented text selection and temporarily worked around text scaling

Cairo/Perspex.Cairo/Media/DrawingContext.cs

@@ -51,7 +51,7 @@ namespace Perspex.Cairo.Media
             this.Drawable = drawable;
             this.context = Gdk.CairoHelper.Create(drawable);
             this.CurrentTransform = Matrix.Identity;
-        }
+         }
 
         public Matrix CurrentTransform
         {
@@ -175,7 +175,7 @@ namespace Perspex.Cairo.Media
         /// </summary>
         /// <param name="pen">The pen.</param>
         /// <param name="rect">The rectangle bounds.</param>
-        public void DrawRectange(Pen pen, Rect rect)
+        public void DrawRectange(Pen pen, Rect rect, float cornerRadius)
         {
             this.SetPen(pen);
             this.context.Rectangle(rect.ToCairo());
@@ -192,7 +192,7 @@ namespace Perspex.Cairo.Media
         {
             var layout = ((FormattedTextImpl)text.PlatformImpl).Layout;
             this.SetBrush(foreground);
-            
+
             this.context.MoveTo(origin.X, origin.Y);
             Pango.CairoHelper.ShowLayout(this.context, layout);
         }
@@ -202,7 +202,7 @@ namespace Perspex.Cairo.Media
         /// </summary>
         /// <param name="brush">The brush.</param>
         /// <param name="rect">The rectangle bounds.</param>
-        public void FillRectange(Perspex.Media.Brush brush, Rect rect)
+        public void FillRectange(Perspex.Media.Brush brush, Rect rect, float cornerRadius)
         {
             this.SetBrush(brush);
             this.context.Rectangle(rect.ToCairo());

Cairo/Perspex.Cairo/Media/FormattedTextImpl.cs

@@ -29,11 +29,11 @@ namespace Perspex.Cairo.Media
             this.Layout.FontDescription = new Pango.FontDescription
             {
                 Family = fontFamily,
-                Size = Pango.Units.FromDouble(fontSize),
+                Size = Pango.Units.FromDouble(fontSize * 0.73),
                 Style = (Pango.Style)fontStyle,
                 Weight = fontWeight.ToCairo()
             };
-
+            
             this.Layout.Alignment = textAlignment.ToCairo();
         }
 
@@ -92,8 +92,14 @@ namespace Perspex.Cairo.Media
 
         public IEnumerable<Rect> HitTestTextRange(int index, int length, Point origin)
         {
-            // TODO: Implement.
-            return new Rect[0];
+            var ranges = new List<Rect>();
+        
+            for (var i = 0; i < length; i++)
+            {
+                ranges.Add(this.HitTestTextPosition(index+i));
+            }
+            
+            return ranges;
         }
 
         public Size Measure()
@@ -102,11 +108,6 @@ namespace Perspex.Cairo.Media
             int height;
             this.Layout.GetPixelSize(out width, out height);
         
-            if (this.Layout.Alignment == Pango.Alignment.Right)
-            {
-                return new Size(width, height);
-            }
-
             return new Size(width, height);
         }