src/Tizen.NUI/src/internal/Xaml/FillResourceDictionariesVisitor.cs

   1 /*
   2  * Copyright(c) 2022 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 using System;
  19 using System.Collections;
  20 using System.Collections.Generic;
  21 using System.Reflection;
  22 using Tizen.NUI.Binding;
  23
  24 namespace Tizen.NUI.Xaml
  25 {
  26     internal class FillResourceDictionariesVisitor : IXamlNodeVisitor
  27     {
  28         public FillResourceDictionariesVisitor(HydrationContext context)
  29         {
  30             Context = context;
  31         }
  32
  33         HydrationContext Context { get; }
  34         Dictionary<INode, object> Values => Context.Values;
  35
  36         public TreeVisitingMode VisitingMode => TreeVisitingMode.TopDown;
  37         public bool StopOnDataTemplate => true;
  38         public bool StopOnResourceDictionary => false;
  39         public bool VisitNodeOnDataTemplate => false;
  40
  41         public bool IsResourceDictionary(ElementNode node) => typeof(ResourceDictionary).IsAssignableFrom(Context.Types[node]);
  42
  43         public void Visit(ValueNode node, INode parentNode)
  44         {
  45                         if (!Context.Types.TryGetValue((IElementNode)parentNode, out var type) || !typeof(ResourceDictionary).IsAssignableFrom(type))
  46                 return;
  47
  48             node.Accept(new ApplyPropertiesVisitor(Context, stopOnResourceDictionary: false), parentNode);
  49         }
  50
  51         public void Visit(MarkupNode node, INode parentNode)
  52         {
  53         }
  54
  55         public void Visit(ElementNode node, INode parentNode)
  56         {
  57             if (!Values.TryGetValue(node, out var value) && Context.ExceptionHandler != null)
  58                                 return;
  59             XmlName propertyName;
  60             //Set RD to VE
  61             if (typeof(ResourceDictionary).IsAssignableFrom(Context.Types[node]) && ApplyPropertiesVisitor.TryGetPropertyName(node, parentNode, out propertyName))
  62             {
  63                 if ((propertyName.LocalName == "XamlResources" ||
  64                      propertyName.LocalName.EndsWith(".XamlResources", StringComparison.Ordinal)) && value is ResourceDictionary)
  65                 {
  66                     var source = Values[parentNode];
  67                     ApplyPropertiesVisitor.SetPropertyValue(source, propertyName, value, Context.RootElement, node, Context, node);
  68                     return;
  69                 }
  70             }
  71
  72             //Only proceed further if the node is a keyless RD
  73             if (parentNode is IElementNode
  74                                 && Context.Types.TryGetValue((IElementNode)parentNode, out var parentType)
  75                                 && typeof(ResourceDictionary).IsAssignableFrom(parentType)
  76                 && !((IElementNode)parentNode).Properties.ContainsKey(XmlName.xKey))
  77                 node.Accept(new ApplyPropertiesVisitor(Context, stopOnResourceDictionary: false), parentNode);
  78             else if (parentNode is ListNode
  79                      && typeof(ResourceDictionary).IsAssignableFrom(Context.Types[((IElementNode)parentNode.Parent)])
  80                      && !((IElementNode)parentNode.Parent).Properties.ContainsKey(XmlName.xKey))
  81                 node.Accept(new ApplyPropertiesVisitor(Context, stopOnResourceDictionary: false), parentNode);
  82         }
  83
  84         public void Visit(RootNode node, INode parentNode)
  85         {
  86         }
  87
  88         public void Visit(ListNode node, INode parentNode)
  89         {
  90         }
  91
  92         public bool SkipChildren(INode node, INode parentNode)
  93         {
  94             var enode = node as ElementNode;
  95             if (enode is null)
  96                 return false;
  97             if (parentNode is IElementNode
  98                                 && Context.Types.TryGetValue((IElementNode)parentNode, out var parentType)
  99                                 && typeof(ResourceDictionary).IsAssignableFrom(parentType)
 100                 && !((IElementNode)parentNode).Properties.ContainsKey(XmlName.xKey))
 101                 return true;
 102             if (parentNode is ListNode
 103                 && typeof(ResourceDictionary).IsAssignableFrom(Context.Types[((IElementNode)parentNode.Parent)])
 104                 && !((IElementNode)parentNode.Parent).Properties.ContainsKey(XmlName.xKey))
 105                 return true;
 106             return false;
 107         }
 108     }
 109 }