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using System;
using System.Collections.Generic;
using System.Linq;
using Windows.UI.Text;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
namespace Xamarin.Forms.Platform.WinRT
{
internal sealed class WindowsPhoneResourcesProvider
: ISystemResourcesProvider
{
public IResourceDictionary GetSystemResources()
{
var windowsResources = Windows.UI.Xaml.Application.Current.Resources;
var resources = new ResourceDictionary ();
resources[Device.Styles.TitleStyleKey] = GetStyle ("HeaderTextBlockStyle");
resources[Device.Styles.SubtitleStyleKey] = GetStyle ("SubheaderTextBlockStyle");
resources[Device.Styles.BodyStyleKey] = GetStyle ("BodyTextBlockStyle");
resources[Device.Styles.CaptionStyleKey] = GetStyle ("BodyTextBlockStyle");
resources[Device.Styles.ListItemTextStyleKey] = GetStyle ("ListViewItemTextBlockStyle");
resources[Device.Styles.ListItemDetailTextStyleKey] = GetStyle ("ListViewItemContentTextBlockStyle");
return resources;
}
Style GetStyle (object nativeKey)
{
var style = (Windows.UI.Xaml.Style) Windows.UI.Xaml.Application.Current.Resources[nativeKey];
style = GetAncestorSetters(style);
var formsStyle = new Style (typeof (Label));
foreach (var b in style.Setters) {
var setter = b as Windows.UI.Xaml.Setter;
if (setter == null)
continue;
// TODO: Need to implement a stealth pass-through for things we don't support
if (setter.Property == TextBlock.FontSizeProperty)
formsStyle.Setters.Add (Label.FontSizeProperty, setter.Value);
else if (setter.Property == TextBlock.FontFamilyProperty)
formsStyle.Setters.Add (Label.FontFamilyProperty, setter.Value);
else if (setter.Property == TextBlock.FontWeightProperty)
formsStyle.Setters.Add (Label.FontAttributesProperty, ToAttributes (Convert.ToUInt16 (setter.Value)));
else if (setter.Property == TextBlock.TextWrappingProperty)
formsStyle.Setters.Add (Label.LineBreakModeProperty, ToLineBreakMode ((TextWrapping) setter.Value));
}
return formsStyle;
}
static Windows.UI.Xaml.Style GetAncestorSetters (Windows.UI.Xaml.Style value)
{
var style = new Windows.UI.Xaml.Style (value.TargetType)
{
BasedOn = value.BasedOn
};
foreach (var valSetter in value.Setters)
{
style.Setters.Add(valSetter);
}
var ancestorStyles = new List<Windows.UI.Xaml.Style> ();
Windows.UI.Xaml.Style currStyle = style;
while (currStyle.BasedOn != null)
{
ancestorStyles.Add(currStyle.BasedOn);
currStyle = currStyle.BasedOn;
}
foreach (var styleParent in ancestorStyles)
{
foreach (var b in styleParent.Setters)
{
var parentSetter = b as Windows.UI.Xaml.Setter;
if (parentSetter == null)
continue;
var derviedSetter = style.Setters
.OfType<Windows.UI.Xaml.Setter> ()
.FirstOrDefault (x => x.Property == parentSetter.Property);
//Ignore any ancestor setters which a child setter has already overridden
if (derviedSetter != null)
continue;
else
style.Setters.Add (parentSetter);
}
}
return style;
}
static LineBreakMode ToLineBreakMode (TextWrapping value)
{
switch (value) {
case TextWrapping.Wrap:
return LineBreakMode.CharacterWrap;
case TextWrapping.WrapWholeWords:
return LineBreakMode.WordWrap;
default:
case TextWrapping.NoWrap:
return LineBreakMode.NoWrap;
}
}
static FontAttributes ToAttributes (ushort uweight)
{
if (uweight == FontWeights.Bold.Weight || uweight == FontWeights.SemiBold.Weight || uweight == FontWeights.ExtraBold.Weight) {
return FontAttributes.Bold;
}
return FontAttributes.None;
}
}
}
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