39 lines
1.4 KiB
C#
39 lines
1.4 KiB
C#
|
using System.Globalization;
|
||
|
|
using System.Linq;
|
||
|
|
using System.Windows.Markup;
|
||
|
|
using System.Windows.Media;
|
||
|
|
|
||
|
|
namespace PCL.Core.Utils.Exts;
|
||
|
|
|
||
|
|
public static class LanguageSpecificStringDictionaryExtensions
|
||
|
|
{
|
||
|
|
public static string GetForCurrentUiCulture(this LanguageSpecificStringDictionary dict, string? fallback = null)
|
||
|
|
{
|
||
|
|
var ui = CultureInfo.CurrentUICulture;
|
||
|
|
|
||
|
|
// 1) 精确匹配，如 zh-Hans-CN
|
||
|
|
if (TryFromTag(dict, ui.IetfLanguageTag, out var v))
|
||
|
|
return v;
|
||
|
|
|
||
|
|
// 2) 逐级回退，如 zh-Hans-CN -> zh-Hans -> zh
|
||
|
|
var tag = ui.IetfLanguageTag;
|
||
|
|
for (var dash = tag.LastIndexOf('-'); dash > 0; dash = tag.LastIndexOf('-'))
|
||
|
|
{
|
||
|
|
tag = tag.Substring(0, dash);
|
||
|
|
if (TryFromTag(dict, tag, out v))
|
||
|
|
return v;
|
||
|
|
}
|
||
|
|
|
||
|
|
// 3) 再尝试父文化（当 CurrentUICulture 是特定文化时）
|
||
|
|
if (!ui.IsNeutralCulture && TryFromTag(dict, ui.Parent.IetfLanguageTag, out v))
|
||
|
|
return v;
|
||
|
|
|
||
|
|
// 4) 兜底：取字典中的第一个值，或使用传入的 fallback，或空字符串
|
||
|
|
if (dict.Count > 0) return dict.Values!.First();
|
||
|
|
return fallback ?? string.Empty;
|
||
|
|
|
||
|
|
static bool TryFromTag(LanguageSpecificStringDictionary d, string ietf, out string value)
|
||
|
|
=> d.TryGetValue(XmlLanguage.GetLanguage(ietf), out value!);
|
||
|
|
}
|
||
|
|
}
|