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

   1 using System;
   2 using System.Collections.Generic;
   3
   4 namespace Tizen.NUI.Binding
   5 {
   6         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 }