1 files changed, 72 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.iOS/ResourcesProvider.cs b/Xamarin.Forms.Platform.iOS/ResourcesProvider.cs
new file mode 100644
index 00000000..847107d9
--- /dev/null
+++ b/Xamarin.Forms.Platform.iOS/ResourcesProvider.cs
@@ -0,0 +1,72 @@
+#if __UNIFIED__
+using UIKit;
+
+#else
+using MonoTouch.UIKit;
+#endif
+
+namespace Xamarin.Forms.Platform.iOS
+{
+	internal class ResourcesProvider : ISystemResourcesProvider
+	{
+		ResourceDictionary _dictionary;
+
+		public ResourcesProvider()
+		{
+			if (Forms.IsiOS7OrNewer)
+				UIApplication.Notifications.ObserveContentSizeCategoryChanged((sender, args) => UpdateStyles());
+		}
+
+		public IResourceDictionary GetSystemResources()
+		{
+			_dictionary = new ResourceDictionary();
+			UpdateStyles();
+
+			return _dictionary;
+		}
+
+		Style GenerateListItemDetailTextStyle()
+		{
+			var font = new UITableViewCell(UITableViewCellStyle.Subtitle, "Foobar").DetailTextLabel.Font;
+			return GenerateStyle(font);
+		}
+
+		Style GenerateListItemTextStyle()
+		{
+			var font = new UITableViewCell(UITableViewCellStyle.Subtitle, "Foobar").TextLabel.Font;
+			return GenerateStyle(font);
+		}
+
+		Style GenerateStyle(UIFont font)
+		{
+			var result = new Style(typeof(Label));
+
+			result.Setters.Add(new Setter { Property = Label.FontSizeProperty, Value = (double)font.PointSize });
+
+			result.Setters.Add(new Setter { Property = Label.FontFamilyProperty, Value = font.Name });
+
+			return result;
+		}
+
+		void UpdateStyles()
+		{
+			if (Forms.IsiOS7OrNewer)
+			{
+				_dictionary[Device.Styles.TitleStyleKey] = GenerateStyle(UIFont.PreferredHeadline);
+				_dictionary[Device.Styles.SubtitleStyleKey] = GenerateStyle(UIFont.PreferredSubheadline);
+				_dictionary[Device.Styles.BodyStyleKey] = GenerateStyle(UIFont.PreferredBody);
+				_dictionary[Device.Styles.CaptionStyleKey] = GenerateStyle(UIFont.PreferredCaption1);
+			}
+			else
+			{
+				_dictionary[Device.Styles.TitleStyleKey] = GenerateStyle(UIFont.BoldSystemFontOfSize(17));
+				_dictionary[Device.Styles.SubtitleStyleKey] = GenerateStyle(UIFont.SystemFontOfSize(15));
+				_dictionary[Device.Styles.BodyStyleKey] = GenerateStyle(UIFont.SystemFontOfSize(17));
+				_dictionary[Device.Styles.CaptionStyleKey] = GenerateStyle(UIFont.SystemFontOfSize(12));
+			}
+
+			_dictionary[Device.Styles.ListItemTextStyleKey] = GenerateListItemTextStyle();
+			_dictionary[Device.Styles.ListItemDetailTextStyleKey] = GenerateListItemDetailTextStyle();
+		}
+	}
+}
+\ No newline at end of file