src/Tizen.NUI/src/internal/XamlBinding/ResourcesExtensions.cs

   1 using System;
   2 using System.Collections.Generic;
   3
   4 namespace Tizen.NUI.Binding
   5 {
   6     internal static class ResourcesExtensions
   7     {
   8         public static IEnumerable<KeyValuePair<string, object>> GetMergedResources(this IElement element)
   9         {
  10             Dictionary<string, object> resources = null;
  11             while (element != null)
  12             {
  13                 var ve = element as IResourcesProvider;
  14                 if (ve != null && ve.IsResourcesCreated)
  15                 {
  16                     resources = resources ?? new Dictionary<string, object>();
  17                     foreach (KeyValuePair<string, object> res in ve.Resources.MergedResources)
  18                         if (!resources.ContainsKey(res.Key))
  19                             resources.Add(res.Key, res.Value);
  20                         else if (res.Key.StartsWith(Style.StyleClassPrefix, StringComparison.Ordinal))
  21                         {
  22                             var mergedClassStyles = new List<Style>(resources[res.Key] as List<Style>);
  23                             mergedClassStyles.AddRange(res.Value as List<Style>);
  24                             resources[res.Key] = mergedClassStyles;
  25                         }
  26                 }
  27                 var app = element as Application;
  28                 if (app != null && app.SystemResources != null)
  29                 {
  30                     resources = resources ?? new Dictionary<string, object>(8);
  31                     foreach (KeyValuePair<string, object> res in app.SystemResources)
  32                         if (!resources.ContainsKey(res.Key))
  33                             resources.Add(res.Key, res.Value);
  34                         else if (res.Key.StartsWith(Style.StyleClassPrefix, StringComparison.Ordinal))
  35                         {
  36                             var mergedClassStyles = new List<Style>(resources[res.Key] as List<Style>);
  37                             mergedClassStyles.AddRange(res.Value as List<Style>);
  38                             resources[res.Key] = mergedClassStyles;
  39                         }
  40                 }
  41                 element = element.Parent;
  42             }
  43             return resources;
  44         }
  45
  46         public static bool TryGetResource(this IElement element, string key, out object value)
  47         {
  48             while (element != null)
  49             {
  50                 var ve = element as IResourcesProvider;
  51                 if (ve != null && ve.IsResourcesCreated && ve.Resources.TryGetValue(key, out value))
  52                     return true;
  53                 var app = element as Application;
  54                 if (app != null && app.SystemResources != null && app.SystemResources.TryGetValue(key, out value))
  55                     return true;
  56                 element = element.Parent;
  57             }
  58
  59             //Fallback for the XF previewer
  60             if (Application.Current != null && ((IResourcesProvider)Application.Current).IsResourcesCreated && Application.Current.Resources.TryGetValue(key, out value))
  61                 return true;
  62
  63             value = null;
  64             return false;
  65         }
  66     }
  67 }