From: YeongJong Lee <cleanlyj@naver.com>
Date: Tue, 24 Nov 2020 08:54:49 +0000 (+0900)
Subject: [NUI] remove unused Xamarin style classes (#2184)
X-Git-Tag: accepted/tizen/unified/20210219.040944~249
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b186c76d709f411aacb0b461693b52a01dd74cc4;p=platform%2Fcore%2Fcsapi%2Ftizenfx.git

[NUI] remove unused Xamarin style classes (#2184)

NUI uses `Tizen.NUI.BaseComponents.ViewStyle` instead of
`Tizen.NUI.Binding.Style` which is copied from xamarin.
---

diff --git a/src/Tizen.NUI/src/internal/Xaml/ApplyPropertiesVisitor.cs b/src/Tizen.NUI/src/internal/Xaml/ApplyPropertiesVisitor.cs
index ab01ef6..18d91ec 100755
--- a/src/Tizen.NUI/src/internal/Xaml/ApplyPropertiesVisitor.cs
+++ b/src/Tizen.NUI/src/internal/Xaml/ApplyPropertiesVisitor.cs
@@ -6,7 +6,6 @@ using System.Reflection;
 using System.Xml;
 using Tizen.NUI.Binding.Internals;
 using Tizen.NUI.Binding;
-using Tizen.NUI.StyleSheets;
 
 using static System.String;
 
@@ -709,12 +708,8 @@ namespace Tizen.NUI.Xaml
 
             if (xKey != null)
                 resourceDictionary.Add(xKey, value);
-            else if (value is Tizen.NUI.Binding.Style)
-                resourceDictionary.Add((Tizen.NUI.Binding.Style)value);
             else if (value is ResourceDictionary)
                 resourceDictionary.Add((ResourceDictionary)value);
-            else if (value is StyleSheets.StyleSheet)
-                resourceDictionary.Add((StyleSheets.StyleSheet)value);
             else
             {
                 exception = new XamlParseException("resources in ResourceDictionary require a x:Key attribute", lineInfo);
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/Device.cs b/src/Tizen.NUI/src/internal/XamlBinding/Device.cs
index 8dc1cec..ff77077 100755
--- a/src/Tizen.NUI/src/internal/XamlBinding/Device.cs
+++ b/src/Tizen.NUI/src/internal/XamlBinding/Device.cs
@@ -127,32 +127,5 @@ namespace Tizen.NUI.Binding
         // {
         //     return PlatformServices.GetNamedSize(size, targetElementType, useOldSizes);
         // }
-
-        public static class Styles
-        {
-            public const string TitleStyleKey = "TitleStyle";
-
-            public const string SubtitleStyleKey = "SubtitleStyle";
-
-            public const string BodyStyleKey = "BodyStyle";
-
-            public const string ListItemTextStyleKey = "ListItemTextStyle";
-
-            public const string ListItemDetailTextStyleKey = "ListItemDetailTextStyle";
-
-            public const string CaptionStyleKey = "CaptionStyle";
-
-            public static readonly Style TitleStyle = new Style(typeof(Tizen.NUI.BaseComponents.TextLabel)) { BaseResourceKey = TitleStyleKey };
-
-            public static readonly Style SubtitleStyle = new Style(typeof(Tizen.NUI.BaseComponents.TextLabel)) { BaseResourceKey = SubtitleStyleKey };
-
-            public static readonly Style BodyStyle = new Style(typeof(Tizen.NUI.BaseComponents.TextLabel)) { BaseResourceKey = BodyStyleKey };
-
-            public static readonly Style ListItemTextStyle = new Style(typeof(Tizen.NUI.BaseComponents.TextLabel)) { BaseResourceKey = ListItemTextStyleKey };
-
-            public static readonly Style ListItemDetailTextStyle = new Style(typeof(Tizen.NUI.BaseComponents.TextLabel)) { BaseResourceKey = ListItemDetailTextStyleKey };
-
-            public static readonly Style CaptionStyle = new Style(typeof(Tizen.NUI.BaseComponents.TextLabel)) { BaseResourceKey = CaptionStyleKey };
-        }
     }
 }
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/MergedStyle.cs b/src/Tizen.NUI/src/internal/XamlBinding/MergedStyle.cs
deleted file mode 100755
index 8810ed2..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/MergedStyle.cs
+++ /dev/null
@@ -1,173 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Reflection;
-using Tizen.NUI.StyleSheets;
-using Tizen.NUI.BaseComponents;
-
-namespace Tizen.NUI.Binding
-{
-    internal sealed class MergedStyle : IStyle
-    {
-        ////If the base type is one of these, stop registering dynamic resources further
-        ////The last one (typeof(Element)) is a safety guard as we might be creating VisualElement directly in internal code
-        static readonly IList<Type> s_stopAtTypes = new List<Type> { typeof(View), typeof(Element) };
-
-        IList<BindableProperty> _classStyleProperties;
-
-        readonly List<BindableProperty> _implicitStyles = new List<BindableProperty>();
-
-        IList<Style> _classStyles;
-
-        IStyle _implicitStyle;
-
-        IStyle _style;
-
-        IList<string> _styleClass;
-
-        public MergedStyle(Type targetType, BindableObject target)
-        {
-            Target = target;
-            TargetType = targetType;
-            RegisterImplicitStyles();
-            Apply(Target);
-        }
-
-        public IStyle Style
-        {
-            get { return _style; }
-            set { SetStyle(ImplicitStyle, ClassStyles, value); }
-        }
-
-        public IList<string> StyleClass
-        {
-            get { return _styleClass; }
-            set
-            {
-                if (_styleClass == value)
-                    return;
-
-                if (_styleClass != null && _classStyles != null)
-                    foreach (var classStyleProperty in _classStyleProperties)
-                        Target.RemoveDynamicResource(classStyleProperty);
-
-                _styleClass = value;
-
-                if (_styleClass != null)
-                {
-                    _classStyleProperties = new List<BindableProperty>();
-                    foreach (var styleClass in _styleClass)
-                    {
-                        var classStyleProperty = BindableProperty.Create("ClassStyle", typeof(IList<Style>), typeof(View), default(IList<Style>),
-                            propertyChanged: (bindable, oldvalue, newvalue) => ((View)bindable)._mergedStyle.OnClassStyleChanged());
-                        _classStyleProperties.Add(classStyleProperty);
-                        Target.OnSetDynamicResource(classStyleProperty, Tizen.NUI.Binding.Style.StyleClassPrefix + styleClass);
-                    }
-                }
-            }
-        }
-
-        public BindableObject Target { get; }
-
-        IList<Style> ClassStyles
-        {
-            get { return _classStyles; }
-            set { SetStyle(ImplicitStyle, value, Style); }
-        }
-
-        IStyle ImplicitStyle
-        {
-            get { return _implicitStyle; }
-            set { SetStyle(value, ClassStyles, Style); }
-        }
-
-        public void Apply(BindableObject bindable)
-        {
-            ImplicitStyle?.Apply(bindable);
-            if (ClassStyles != null)
-                foreach (var classStyle in ClassStyles)
-                    ((IStyle)classStyle)?.Apply(bindable);
-            Style?.Apply(bindable);
-        }
-
-        public Type TargetType { get; }
-
-        public void UnApply(BindableObject bindable)
-        {
-            Style?.UnApply(bindable);
-            if (ClassStyles != null)
-                foreach (var classStyle in ClassStyles)
-                    ((IStyle)classStyle)?.UnApply(bindable);
-            ImplicitStyle?.UnApply(bindable);
-        }
-
-        void OnClassStyleChanged()
-        {
-            ClassStyles = _classStyleProperties.Select(p => (Target.GetValue(p) as IList<Style>)?.FirstOrDefault(s => s.CanBeAppliedTo(TargetType))).ToList();
-        }
-
-        void OnImplicitStyleChanged()
-        {
-            var first = true;
-            foreach (BindableProperty implicitStyleProperty in _implicitStyles)
-            {
-                var implicitStyle = (Style)Target.GetValue(implicitStyleProperty);
-                if (implicitStyle != null)
-                {
-                    if (first || implicitStyle.ApplyToDerivedTypes)
-                    {
-                        ImplicitStyle = implicitStyle;
-                        return;
-                    }
-                }
-                first = false;
-            }
-        }
-
-        void RegisterImplicitStyles()
-        {
-            Type type = TargetType;
-            if (type == null)
-            {
-                return;
-            }
-            while (true)
-            {
-                BindableProperty implicitStyleProperty = BindableProperty.Create(nameof(ImplicitStyle), typeof(Style), typeof(View), default(Style),
-                        propertyChanged: (bindable, oldvalue, newvalue) => OnImplicitStyleChanged());
-                _implicitStyles.Add(implicitStyleProperty);
-                Target.SetDynamicResource(implicitStyleProperty, type.FullName);
-                type = type.GetTypeInfo().BaseType;
-                if (s_stopAtTypes.Contains(type))
-                    return;
-            }
-        }
-
-        void SetStyle(IStyle implicitStyle, IList<Style> classStyles, IStyle style)
-        {
-            bool shouldReApplyStyle = implicitStyle != ImplicitStyle || classStyles != ClassStyles || Style != style;
-            bool shouldReApplyClassStyle = implicitStyle != ImplicitStyle || classStyles != ClassStyles;
-            bool shouldReApplyImplicitStyle = implicitStyle != ImplicitStyle && (Style as Style == null || ((Style)Style).CanCascade);
-
-            if (shouldReApplyStyle)
-                Style?.UnApply(Target);
-            if (shouldReApplyClassStyle && ClassStyles != null)
-                foreach (var classStyle in ClassStyles)
-                    ((IStyle)classStyle)?.UnApply(Target);
-            if (shouldReApplyImplicitStyle)
-                ImplicitStyle?.UnApply(Target);
-
-            _implicitStyle = implicitStyle;
-            _classStyles = classStyles;
-            _style = style;
-
-            if (shouldReApplyImplicitStyle)
-                ImplicitStyle?.Apply(Target);
-            if (shouldReApplyClassStyle && ClassStyles != null)
-                foreach (var classStyle in ClassStyles)
-                    ((IStyle)classStyle)?.Apply(Target);
-            if (shouldReApplyStyle)
-                Style?.Apply(Target);
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/ResourcesExtensions.cs b/src/Tizen.NUI/src/internal/XamlBinding/ResourcesExtensions.cs
index 4c0f37d..4739051 100755
--- a/src/Tizen.NUI/src/internal/XamlBinding/ResourcesExtensions.cs
+++ b/src/Tizen.NUI/src/internal/XamlBinding/ResourcesExtensions.cs
@@ -24,12 +24,6 @@ namespace Tizen.NUI.Binding
                         foreach (KeyValuePair<string, object> res in ve.XamlResources.MergedResources)
                             if (!resources.ContainsKey(res.Key))
                                 resources.Add(res.Key, res.Value);
-                            else if (res.Key.StartsWith(Style.StyleClassPrefix, StringComparison.Ordinal))
-                            {
-                                var mergedClassStyles = new List<Style>(resources[res.Key] as List<Style>);
-                                mergedClassStyles.AddRange(res.Value as List<Style>);
-                                resources[res.Key] = mergedClassStyles;
-                            }
                     }
                 }
 
@@ -45,12 +39,6 @@ namespace Tizen.NUI.Binding
                     foreach (KeyValuePair<string, object> res in app.SystemResources)
                         if (!resources.ContainsKey(res.Key))
                             resources.Add(res.Key, res.Value);
-                        else if (res.Key.StartsWith(Style.StyleClassPrefix, StringComparison.Ordinal))
-                        {
-                            var mergedClassStyles = new List<Style>(resources[res.Key] as List<Style>);
-                            mergedClassStyles.AddRange(res.Value as List<Style>);
-                            resources[res.Key] = mergedClassStyles;
-                        }
                 }
                 element = element.Parent;
             }
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/CharExtensions.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/CharExtensions.cs
deleted file mode 100755
index a6166a3..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/CharExtensions.cs
+++ /dev/null
@@ -1,41 +0,0 @@
-using System.Runtime.CompilerServices;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal static class CharExtensions
-    {
-        //w			[ \t\r\n\f]*
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool IsW(this char c)
-        {
-            return c == ' '
-                || c == '\t'
-                || c == '\r'
-                || c == '\n'
-                || c == '\f';
-        }
-
-        //nmstart	[_a-z]|{nonascii}|{escape}
-        //escape	{unicode}|\\[^\n\r\f0-9a-f]
-        //nonascii	[^\0-\237]
-        // TODO support escape and nonascii
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool IsNmStart(this char c)
-        {
-            return c == '_' || char.IsLetter(c);
-        }
-
-        //nmchar	[_a-z0-9-]|{nonascii}|{escape}
-        //unicode	\\[0-9a-f]{1,6}(\r\n|[ \n\r\t\f])?
-        //escape	{unicode}|\\[^\n\r\f0-9a-f]
-        //nonascii	[^\0-\237]
-        //TODO support escape, nonascii and unicode
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public static bool IsNmChar(this char c)
-        {
-            return c == '_'
-                || c == '-'
-                || char.IsLetterOrDigit(c);
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/CssReader.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/CssReader.cs
deleted file mode 100755
index 34f4081..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/CssReader.cs
+++ /dev/null
@@ -1,99 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.IO;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal sealed class CssReader : TextReader
-    {
-        readonly TextReader _reader;
-
-        public CssReader(TextReader reader)
-        {
-            if (reader == null)
-                throw new ArgumentNullException(nameof(reader));
-
-            _reader = reader;
-        }
-
-        readonly Queue<char> _cache = new Queue<char>();
-
-        //skip comments
-        //TODO unescape escaped sequences
-        public override int Peek()
-        {
-            if (_cache.Count > 0)
-                return _cache.Peek();
-
-            int p = _reader.Peek();
-            if (p <= 0)
-                return p;
-            if (unchecked((char)p) != '/')
-                return p;
-
-            _cache.Enqueue(unchecked((char)_reader.Read()));
-            p = _reader.Peek();
-            if (p <= 0)
-                return _cache.Peek();
-            if (unchecked((char)p) != '*')
-                return _cache.Peek();
-
-            _cache.Clear();
-            _reader.Read(); //consume the '*'
-
-            bool hasStar = false;
-            while (true)
-            {
-                var next = _reader.Read();
-                if (next <= 0)
-                    return next;
-                if (unchecked((char)next) == '*')
-                    hasStar = true;
-                else if (hasStar && unchecked((char)next) == '/')
-                    return Peek(); //recursively call self for comments following comments
-                else
-                    hasStar = false;
-            }
-        }
-
-        //skip comments
-        //TODO unescape escaped sequences
-        public override int Read()
-        {
-            if (_cache.Count > 0)
-                return _cache.Dequeue();
-
-            int p = _reader.Read();
-            if (p <= 0)
-                return p;
-            var c = unchecked((char)p);
-            if (c != '/')
-                return p;
-
-            _cache.Enqueue(c);
-            p = _reader.Read();
-            if (p <= 0)
-                return _cache.Dequeue();
-            c = unchecked((char)p);
-            if (c != '*')
-                return _cache.Dequeue();
-
-            _cache.Clear();
-            _reader.Read(); //consume the '*'
-
-            bool hasStar = false;
-            while (true)
-            {
-                var next = _reader.Read();
-                if (next <= 0)
-                    return next;
-                if (unchecked((char)next) == '*')
-                    hasStar = true;
-                else if (hasStar && unchecked((char)next) == '/')
-                    return Read(); //recursively call self for comments following comments
-                else
-                    hasStar = false;
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/IStyle.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/IStyle.cs
deleted file mode 100755
index 1cb59e3..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/IStyle.cs
+++ /dev/null
@@ -1,13 +0,0 @@
-using System;
-using Tizen.NUI.Binding;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal interface IStyle
-    {
-        Type TargetType { get; }
-
-        void Apply(BindableObject bindable);
-        void UnApply(BindableObject bindable);
-    }
-}
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/IStyleSelectable.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/IStyleSelectable.cs
deleted file mode 100755
index 79c1e08..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/IStyleSelectable.cs
+++ /dev/null
@@ -1,20 +0,0 @@
-using System;
-using System.Collections.Generic;
-using Tizen.NUI.Binding;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal interface IStyleSelectable
-    {
-        string[] NameAndBases { get; }
-        string Id { get; }
-        IStyleSelectable Parent { get; }
-        IList<string> Classes { get; }
-        IEnumerable<IStyleSelectable> Children { get; }
-    }
-
-    internal interface IStylable
-    {
-        BindableProperty GetProperty(string key, bool inheriting);
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/Selector.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/Selector.cs
deleted file mode 100755
index 09bb6a7..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/Selector.cs
+++ /dev/null
@@ -1,316 +0,0 @@
-using System;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal abstract class Selector
-    {
-        Selector()
-        {
-        }
-
-        public static Selector Parse(CssReader reader, char stopChar = '\0')
-        {
-            Selector root = All, workingRoot = All;
-            Operator workingRootParent = null;
-            Action<Operator, Selector> setCurrentSelector = (op, sel) => SetCurrentSelector(ref root, ref workingRoot, ref workingRootParent, op, sel);
-
-            int p;
-            reader.SkipWhiteSpaces();
-            while ((p = reader.Peek()) > 0)
-            {
-                switch (unchecked((char)p))
-                {
-                    case '*':
-                        setCurrentSelector(new And(), All);
-                        reader.Read();
-                        break;
-                    case '.':
-                        reader.Read();
-                        var className = reader.ReadIdent();
-                        if (className == null)
-                            return Invalid;
-                        setCurrentSelector(new And(), new Class(className));
-                        break;
-                    case '#':
-                        reader.Read();
-                        var id = reader.ReadName();
-                        if (id == null)
-                            return Invalid;
-                        setCurrentSelector(new And(), new Id(id));
-                        break;
-                    case '[':
-                        throw new NotImplementedException("Attributes not implemented");
-                    case ',':
-                        reader.Read();
-                        setCurrentSelector(new Or(), All);
-                        reader.SkipWhiteSpaces();
-                        break;
-                    case '+':
-                        reader.Read();
-                        setCurrentSelector(new Adjacent(), All);
-                        reader.SkipWhiteSpaces();
-                        break;
-                    case '~':
-                        reader.Read();
-                        setCurrentSelector(new Sibling(), All);
-                        reader.SkipWhiteSpaces();
-                        break;
-                    case '>':
-                        reader.Read();
-                        setCurrentSelector(new Child(), All);
-                        reader.SkipWhiteSpaces();
-                        break;
-                    case '^':               //not in CSS spec
-                        reader.Read();
-                        var element = reader.ReadIdent();
-                        if (element == null) return Invalid;
-                        setCurrentSelector(new And(), new Base(element));
-                        break;
-                    case ' ':
-                    case '\t':
-                    case '\n':
-                    case '\r':
-                    case '\f':
-                        reader.Read();
-                        bool processWs = false;
-                        while ((p = reader.Peek()) > 0)
-                        {
-                            var c = unchecked((char)p);
-                            if (char.IsWhiteSpace(c))
-                            {
-                                reader.Read();
-                                continue;
-                            }
-                            processWs = (c != '+'
-                                        && c != '>'
-                                        && c != ','
-                                        && c != '~'
-                                        && c != '^'
-                                        && c != stopChar);
-                            break;
-                        }
-                        if (!processWs)
-                            break;
-                        setCurrentSelector(new Descendent(), All);
-                        reader.SkipWhiteSpaces();
-                        break;
-                    default:
-                        if (unchecked((char)p) == stopChar)
-                            return root;
-
-                        var elementName = reader.ReadIdent();
-                        if (elementName == null)
-                            return Invalid;
-                        setCurrentSelector(new And(), new Element(elementName));
-                        break;
-                }
-            }
-            return root;
-        }
-
-        static void SetCurrentSelector(ref Selector root, ref Selector workingRoot, ref Operator workingRootParent, Operator op, Selector sel)
-        {
-            var updateRoot = root == workingRoot;
-
-            op.Left = workingRoot;
-            op.Right = sel;
-            workingRoot = op;
-            if (workingRootParent != null)
-                workingRootParent.Right = workingRoot;
-
-            if (updateRoot)
-                root = workingRoot;
-
-            if (workingRoot is Or)
-            {
-                workingRootParent = (Operator)workingRoot;
-                workingRoot = sel;
-            }
-        }
-
-        public abstract bool Matches(IStyleSelectable styleable);
-
-        internal static Selector Invalid = new Generic(s => false);
-        internal static Selector All = new Generic(s => true);
-
-        abstract class UnarySelector : Selector
-        {
-        }
-
-        abstract class Operator : Selector
-        {
-            public Selector Left { get; set; } = Invalid;
-            public Selector Right { get; set; } = Invalid;
-        }
-
-        sealed class Generic : UnarySelector
-        {
-            readonly Func<IStyleSelectable, bool> func;
-            public Generic(Func<IStyleSelectable, bool> func)
-            {
-                this.func = func;
-            }
-
-            public override bool Matches(IStyleSelectable styleable) => func(styleable);
-        }
-
-        sealed class Class : UnarySelector
-        {
-            public Class(string className)
-            {
-                ClassName = className;
-            }
-
-            public string ClassName { get; }
-            public override bool Matches(IStyleSelectable styleable)
-                => styleable.Classes != null && styleable.Classes.Contains(ClassName);
-        }
-
-        sealed class Id : UnarySelector
-        {
-            public Id(string id)
-            {
-                IdName = id;
-            }
-
-            public string IdName { get; }
-            public override bool Matches(IStyleSelectable styleable) => styleable.Id == IdName;
-        }
-
-        sealed class Or : Operator
-        {
-            public override bool Matches(IStyleSelectable styleable) => Right.Matches(styleable) || Left.Matches(styleable);
-        }
-
-        sealed class And : Operator
-        {
-            public override bool Matches(IStyleSelectable styleable) => Right.Matches(styleable) && Left.Matches(styleable);
-        }
-
-        sealed class Element : UnarySelector
-        {
-            public Element(string elementName)
-            {
-                ElementName = elementName;
-            }
-
-            public string ElementName { get; }
-            public override bool Matches(IStyleSelectable styleable) =>
-                string.Equals(styleable.NameAndBases[0], ElementName, StringComparison.OrdinalIgnoreCase);
-        }
-
-        sealed class Base : UnarySelector
-        {
-            public Base(string elementName)
-            {
-                ElementName = elementName;
-            }
-
-            public string ElementName { get; }
-            public override bool Matches(IStyleSelectable styleable)
-            {
-                for (var i = 0; i < styleable.NameAndBases.Length; i++)
-                    if (string.Equals(styleable.NameAndBases[i], ElementName, StringComparison.OrdinalIgnoreCase))
-                        return true;
-                return false;
-            }
-        }
-
-        sealed class Child : Operator
-        {
-            public override bool Matches(IStyleSelectable styleable) =>
-                Right.Matches(styleable) && styleable.Parent != null && Left.Matches(styleable.Parent);
-        }
-
-        sealed class Descendent : Operator
-        {
-            public override bool Matches(IStyleSelectable styleable)
-            {
-                if (!Right.Matches(styleable))
-                    return false;
-                var parent = styleable.Parent;
-                while (parent != null)
-                {
-                    if (Left.Matches(parent))
-                        return true;
-                    parent = parent.Parent;
-                }
-                return false;
-            }
-        }
-
-        sealed class Adjacent : Operator
-        {
-            public override bool Matches(IStyleSelectable styleable)
-            {
-                if (!Right.Matches(styleable))
-                    return false;
-                if (styleable.Parent == null)
-                    return false;
-
-                IStyleSelectable prev = null;
-                foreach (var elem in styleable.Parent.Children)
-                {
-                    if (elem == styleable && prev != null)
-                        return Left.Matches(prev);
-                    prev = elem;
-                }
-                return false;
-                //var index = styleable.Parent.Children.IndexOf(styleable);
-                //if (index == 0)
-                //	return false;
-                //var adjacent = styleable.Parent.Children[index - 1];
-                //return Left.Matches(adjacent);
-            }
-        }
-
-        sealed class Sibling : Operator
-        {
-            public override bool Matches(IStyleSelectable styleable)
-            {
-                if (!Right.Matches(styleable))
-                    return false;
-                if (styleable.Parent == null)
-                    return false;
-
-                int selfIndex = 0;
-                bool foundSelfInParent = false;
-                foreach (var elem in styleable.Parent.Children)
-                {
-                    if (elem == styleable)
-                    {
-                        foundSelfInParent = true;
-                        break;
-                    }
-                    ++selfIndex;
-                }
-
-                if (!foundSelfInParent)
-                    return false;
-
-                int index = 0;
-                foreach (var elem in styleable.Parent.Children)
-                {
-                    if (index >= selfIndex)
-                        return false;
-                    if (Left.Matches(elem))
-                        return true;
-                    ++index;
-                }
-
-                return false;
-
-                //var index = styleable.Parent.Children.IndexOf(styleable);
-                //if (index == 0)
-                //	return false;
-                //int siblingIndex = -1;
-                //for (var i = 0; i < index; i++)
-                //	if (Left.Matches(styleable.Parent.Children[i])) {
-                //		siblingIndex = i;
-                //		break;
-                //	}
-                //return siblingIndex != -1;
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/Style.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/Style.cs
deleted file mode 100755
index f627240..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/Style.cs
+++ /dev/null
@@ -1,107 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Reflection;
-using Tizen.NUI.Binding;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal sealed class Style
-    {
-        Style()
-        {
-        }
-
-        public IDictionary<string, string> Declarations { get; set; } = new Dictionary<string, string>();
-        Dictionary<KeyValuePair<string, string>, object> convertedValues = new Dictionary<KeyValuePair<string, string>, object>();
-
-        public static Style Parse(CssReader reader, char stopChar = '\0')
-        {
-            Style style = new Style();
-            string propertyName = null, propertyValue = null;
-
-            int p;
-            reader.SkipWhiteSpaces();
-            bool readingName = true;
-            while ((p = reader.Peek()) > 0)
-            {
-                switch (unchecked((char)p))
-                {
-                    case ':':
-                        reader.Read();
-                        readingName = false;
-                        reader.SkipWhiteSpaces();
-                        break;
-                    case ';':
-                        reader.Read();
-                        if (!string.IsNullOrEmpty(propertyName) && !string.IsNullOrEmpty(propertyValue))
-                            style.Declarations.Add(propertyName, propertyValue);
-                        propertyName = propertyValue = null;
-                        readingName = true;
-                        reader.SkipWhiteSpaces();
-                        break;
-                    default:
-                        if ((char)p == stopChar)
-                            return style;
-
-                        if (readingName)
-                        {
-                            propertyName = reader.ReadIdent();
-                            if (propertyName == null)
-                                throw new Exception();
-                        }
-                        else
-                            propertyValue = reader.ReadUntil(stopChar, ';', ':');
-                        break;
-                }
-            }
-            return style;
-        }
-
-        public void Apply(/*VisualElement*/BaseHandle styleable, bool inheriting = false)
-        {
-            if (styleable == null)
-                throw new ArgumentNullException(nameof(styleable));
-
-            foreach (var decl in Declarations)
-            {
-                var property = ((IStylable)styleable).GetProperty(decl.Key, inheriting);
-                if (property == null)
-                    continue;
-                if (string.Equals(decl.Value, "initial", StringComparison.OrdinalIgnoreCase))
-                    styleable.ClearValue(property, fromStyle: true);
-                else
-                {
-                    object value;
-                    if (!convertedValues.TryGetValue(decl, out value))
-                        convertedValues[decl] = (value = Convert(styleable, decl.Value, property));
-                    styleable.SetValue(property, value, fromStyle: true);
-                }
-            }
-
-            foreach (var child in styleable.LogicalChildrenInternal)
-            {
-                var ve = child as /*VisualElement*/BaseHandle;
-                if (ve == null)
-                    continue;
-                Apply(ve, inheriting: true);
-            }
-        }
-
-        // [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        static object Convert(object target, object value, BindableProperty property)
-        {
-            Func<MemberInfo> minforetriever = () => property.DeclaringType.GetRuntimeProperty(property.PropertyName) as MemberInfo
-                                                    ?? property.DeclaringType.GetRuntimeMethod("Get" + property.PropertyName, new[] { typeof(BindableObject) }) as MemberInfo;
-            var serviceProvider = new StyleSheetServiceProvider(target, property);
-            // return value.ConvertTo(property.ReturnType, minforetriever, serviceProvider);
-            // Unused parameter
-            _ = value;
-            return null;
-        }
-
-        public void UnApply(IStylable styleable)
-        {
-            throw new NotImplementedException();
-        }
-    }
-}
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StylePropertyAttribute.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StylePropertyAttribute.cs
deleted file mode 100755
index 2b906b9..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StylePropertyAttribute.cs
+++ /dev/null
@@ -1,24 +0,0 @@
-using System;
-using Tizen.NUI.Binding;
-
-namespace Tizen.NUI.StyleSheets
-{
-    [AttributeUsage(AttributeTargets.Assembly, AllowMultiple = true, Inherited = true)]
-    internal sealed class StylePropertyAttribute : Attribute
-    {
-        public string CssPropertyName { get; }
-        public string BindablePropertyName { get; }
-        public Type TargetType { get; }
-        public Type PropertyOwnerType { get; set; }
-        public BindableProperty BindableProperty { get; set; }
-        public bool Inherited { get; set; } = false;
-
-
-        public StylePropertyAttribute(string cssPropertyName, Type targetType, string bindablePropertyName)
-        {
-            CssPropertyName = cssPropertyName;
-            BindablePropertyName = bindablePropertyName;
-            TargetType = targetType;
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheet.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheet.cs
deleted file mode 100755
index 3a0e70a..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheet.cs
+++ /dev/null
@@ -1,129 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.IO;
-using System.Reflection;
-using System.Runtime.CompilerServices;
-using System.Xml;
-using Tizen.NUI.Xaml;
-using Tizen.NUI.Binding;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal sealed class StyleSheet : IStyle
-    {
-        StyleSheet()
-        {
-        }
-
-        internal IDictionary<Selector, Style> Styles { get; set; } = new Dictionary<Selector, Style>();
-
-        public static StyleSheet FromAssemblyResource(Assembly assembly, string resourceId, IXmlLineInfo lineInfo = null)
-        {
-            using (var stream = assembly.GetManifestResourceStream(resourceId))
-            {
-                if (stream == null)
-                    throw new XamlParseException($"No resource found for '{resourceId}'.", lineInfo);
-                using (var reader = new StreamReader(stream))
-                {
-                    return FromReader(reader);
-                }
-            }
-        }
-
-        //used by code generated by XamlC. Has to stay public
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public static StyleSheet FromString(string stylesheet)
-        {
-            if (stylesheet == null)
-                throw new ArgumentNullException(nameof(stylesheet));
-            using (var reader = new StringReader(stylesheet))
-                return FromReader(reader);
-        }
-
-        public static StyleSheet FromReader(TextReader reader)
-        {
-            if (reader == null)
-                throw new ArgumentNullException(nameof(reader));
-
-            return Parse(new CssReader(reader));
-        }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        static StyleSheet Parse(CssReader reader)
-        {
-            var sheet = new StyleSheet();
-
-            Style style = null;
-            var selector = Selector.All;
-
-            int p;
-            bool inStyle = false;
-            reader.SkipWhiteSpaces();
-            while ((p = reader.Peek()) > 0)
-            {
-                switch ((char)p)
-                {
-                    case '@':
-                        throw new NotSupportedException("AT-rules not supported");
-                    case '{':
-                        reader.Read();
-                        style = Style.Parse(reader, '}');
-                        inStyle = true;
-                        break;
-                    case '}':
-                        reader.Read();
-                        if (!inStyle)
-                            throw new Exception();
-                        inStyle = false;
-                        sheet.Styles.Add(selector, style);
-                        style = null;
-                        selector = Selector.All;
-                        break;
-                    default:
-                        selector = Selector.Parse(reader, '{');
-                        break;
-                }
-            }
-            return sheet;
-        }
-
-        Type IStyle.TargetType
-            => typeof(/*VisualElement*/BaseHandle);
-
-        void IStyle.Apply(BindableObject bindable)
-        {
-            var styleable = bindable as Element;
-            if (styleable == null)
-                return;
-            Apply(styleable);
-        }
-
-        void Apply(Element styleable)
-        {
-            ApplyCore(styleable);
-            foreach (var child in styleable.LogicalChildrenInternal)
-                ((IStyle)this).Apply(child);
-        }
-
-        void ApplyCore(Element styleable)
-        {
-            var visualStylable = styleable as /*VisualElement*/BaseHandle;
-            if (visualStylable == null)
-                return;
-            foreach (var kvp in Styles)
-            {
-                var selector = kvp.Key;
-                var style = kvp.Value;
-                // if (!selector.Matches(styleable))
-                // 	continue;
-                style.Apply(visualStylable);
-            }
-        }
-
-        void IStyle.UnApply(BindableObject bindable)
-        {
-            throw new NotImplementedException();
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheetExtensions.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheetExtensions.cs
deleted file mode 100755
index 3a12a85..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheetExtensions.cs
+++ /dev/null
@@ -1,28 +0,0 @@
-using System.Collections.Generic;
-using Tizen.NUI.Binding;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal static class StyleSheetExtensions
-    {
-        public static IEnumerable<StyleSheet> GetStyleSheets(this IResourcesProvider resourcesProvider)
-        {
-            if (resourcesProvider == null)
-            {
-                yield break;
-            }
-            if (!resourcesProvider.IsResourcesCreated)
-            {
-                yield break;
-            }
-            if (resourcesProvider.XamlResources == null || resourcesProvider.XamlResources.StyleSheets == null)
-            {
-                yield break;
-            }
-            foreach (var styleSheet in resourcesProvider.XamlResources.StyleSheets)
-            {
-                yield return styleSheet;
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheetServiceProvider.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheetServiceProvider.cs
deleted file mode 100755
index 96074cc..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/StyleSheetServiceProvider.cs
+++ /dev/null
@@ -1,40 +0,0 @@
-using System;
-using Tizen.NUI.Xaml;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal class StyleSheetServiceProvider : IServiceProvider
-    {
-        IProvideValueTarget vtProvider;
-        IConverterOptions convOptions => new ConverterOptions();
-
-        public StyleSheetServiceProvider(object targetObject, object targetProperty)
-        {
-            vtProvider = new ValueTargetProvider
-            {
-                TargetObject = targetObject,
-                TargetProperty = targetProperty
-            };
-        }
-
-        public object GetService(Type serviceType)
-        {
-            if (serviceType == typeof(IProvideValueTarget))
-                return vtProvider;
-            if (serviceType == typeof(IConverterOptions))
-                return convOptions;
-            return null;
-        }
-
-        class ValueTargetProvider : IProvideValueTarget
-        {
-            public object TargetObject { get; set; }
-            public object TargetProperty { get; set; }
-        }
-
-        class ConverterOptions : IConverterOptions
-        {
-            public bool IgnoreCase => true;
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/TextReaderExtensions.cs b/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/TextReaderExtensions.cs
deleted file mode 100755
index ca965d3..0000000
--- a/src/Tizen.NUI/src/internal/XamlBinding/StyleSheets/TextReaderExtensions.cs
+++ /dev/null
@@ -1,86 +0,0 @@
-using System;
-using System.IO;
-using System.Linq;
-using System.Text;
-
-namespace Tizen.NUI.StyleSheets
-{
-    internal static class TextReaderExtensions
-    {
-        //ident		[-]?{nmstart}{nmchar}*
-        public static string ReadIdent(this TextReader reader)
-        {
-            var sb = new StringBuilder();
-            bool first = true;
-            bool hasLeadingDash = false;
-            int p;
-            while ((p = reader.Peek()) > 0)
-            {
-                var c = unchecked((char)p);
-                if (first && !hasLeadingDash && c == '-')
-                {
-                    sb.Append((char)reader.Read());
-                    hasLeadingDash = true;
-                }
-                else if (first && c.IsNmStart())
-                {
-                    sb.Append((char)reader.Read());
-                    first = false;
-                }
-                else if (first)
-                { //a nmstart is expected
-                    throw new Exception();
-                }
-                else if (c.IsNmChar())
-                    sb.Append((char)reader.Read());
-                else
-                    break;
-            }
-            return sb.ToString();
-        }
-
-        //name		{nmchar}+
-        public static string ReadName(this TextReader reader)
-        {
-            var sb = new StringBuilder();
-            int p;
-            while ((p = reader.Peek()) > 0)
-            {
-                var c = unchecked((char)p);
-                if (c.IsNmChar())
-                    sb.Append((char)reader.Read());
-                else
-                    break;
-            }
-            return sb.ToString();
-        }
-
-        public static string ReadUntil(this TextReader reader, params char[] limit)
-        {
-            var sb = new StringBuilder();
-            int p;
-            while ((p = reader.Peek()) > 0)
-            {
-                var c = unchecked((char)p);
-                if (limit != null && limit.Contains(c))
-                    break;
-                reader.Read();
-                sb.Append(c);
-            }
-            return sb.ToString();
-        }
-
-        //w			[ \t\r\n\f]*
-        public static void SkipWhiteSpaces(this TextReader reader)
-        {
-            int p;
-            while ((p = reader.Peek()) > 0)
-            {
-                var c = unchecked((char)p);
-                if (!c.IsW())
-                    break;
-                reader.Read();
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/public/BaseComponents/View.cs b/src/Tizen.NUI/src/public/BaseComponents/View.cs
index 6f66899..0d2e569 100755
--- a/src/Tizen.NUI/src/public/BaseComponents/View.cs
+++ b/src/Tizen.NUI/src/public/BaseComponents/View.cs
@@ -2094,21 +2094,6 @@ namespace Tizen.NUI.BaseComponents
             }
         }
 
-        /// <since_tizen> 6 </since_tizen>
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public Style XamlStyle
-        {
-            get
-            {
-                return (Style)GetValue(XamlStyleProperty);
-            }
-            set
-            {
-                SetValue(XamlStyleProperty, value);
-            }
-        }
-
         /// <summary>
         /// The Color of View. This is an RGBA value.
         /// </summary>
diff --git a/src/Tizen.NUI/src/public/BaseComponents/ViewBindableProperty.cs b/src/Tizen.NUI/src/public/BaseComponents/ViewBindableProperty.cs
index b2cb0fa..1a76b84 100755
--- a/src/Tizen.NUI/src/public/BaseComponents/ViewBindableProperty.cs
+++ b/src/Tizen.NUI/src/public/BaseComponents/ViewBindableProperty.cs
@@ -1576,12 +1576,6 @@ namespace Tizen.NUI.BaseComponents
         });
 
         /// <summary>
-        /// XamlStyleProperty
-        /// </summary>
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public static readonly BindableProperty XamlStyleProperty = BindableProperty.Create(nameof(XamlStyle), typeof(Style), typeof(View), default(Style), propertyChanged: (bindable, oldvalue, newvalue) => ((View)bindable)._mergedStyle.Style = (Style)newvalue);
-
-        /// <summary>
         /// EnableControlState property
         /// </summary>
         [EditorBrowsable(EditorBrowsableState.Never)]
diff --git a/src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs b/src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs
index 932df83..e7ce022 100755
--- a/src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs
+++ b/src/Tizen.NUI/src/public/BaseComponents/ViewInternal.cs
@@ -31,23 +31,9 @@ namespace Tizen.NUI.BaseComponents
     /// <since_tizen> 3 </since_tizen>
     public partial class View
     {
-        private MergedStyle mergedStyle = null;
         private ViewSelectorData selectorData;
         internal string styleName;
 
-        internal MergedStyle _mergedStyle
-        {
-            get
-            {
-                if (null == mergedStyle)
-                {
-                    mergedStyle = new MergedStyle(GetType(), this);
-                }
-
-                return mergedStyle;
-            }
-        }
-
         /// <summary>
         /// The color mode of View.
         /// This specifies whether the View uses its own color, or inherits its parent color.
diff --git a/src/Tizen.NUI/src/public/Xaml/MarkupExtensions/StyleSheetExtension.cs b/src/Tizen.NUI/src/public/Xaml/MarkupExtensions/StyleSheetExtension.cs
deleted file mode 100755
index a8c29db..0000000
--- a/src/Tizen.NUI/src/public/Xaml/MarkupExtensions/StyleSheetExtension.cs
+++ /dev/null
@@ -1,60 +0,0 @@
-using System;
-using System.Xml;
-using Tizen.NUI.StyleSheets;
-using System.Reflection;
-using System.IO;
-using Tizen.NUI.Binding;
-using System.ComponentModel;
-
-namespace Tizen.NUI.Xaml
-{
-    /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-    [EditorBrowsable(EditorBrowsableState.Never)]
-    [ContentProperty(nameof(Style))]
-    [ProvideCompiled("Tizen.NUI.Core.XamlC.StyleSheetProvider")]
-    public sealed class StyleSheetExtension : IValueProvider
-    {
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public string Style { get; set; }
-
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public Uri Source { get; set; }
-
-        object IValueProvider.ProvideValue(IServiceProvider serviceProvider)
-        {
-            IXmlLineInfo lineInfo;
-
-            if (!string.IsNullOrEmpty(Style) && Source != null)
-            {
-                lineInfo = (serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider)?.XmlLineInfo;
-                throw new XamlParseException($"StyleSheet can not have both a Source and a content", lineInfo);
-            }
-
-            if (Source != null)
-            {
-                lineInfo = (serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider)?.XmlLineInfo;
-                if (Source.IsAbsoluteUri)
-                    throw new XamlParseException($"Source only accepts Relative URIs", lineInfo);
-
-                var rootObjectType = (serviceProvider.GetService(typeof(IRootObjectProvider)) as IRootObjectProvider)?.RootObject.GetType();
-                if (rootObjectType == null)
-                    return null;
-                var rootTargetPath = XamlResourceIdAttribute.GetPathForType(rootObjectType);
-                var resourcePath = ResourceDictionary.RDSourceTypeConverter.GetResourcePath(Source, rootTargetPath);
-                var resString = DependencyService.Get<IResourcesLoader>()?.GetResource(resourcePath, rootObjectType.GetTypeInfo().Assembly, lineInfo);
-                return StyleSheet.FromString(resString);
-            }
-
-            if (!string.IsNullOrEmpty(Style))
-            {
-                using (var reader = new StringReader(Style))
-                    return StyleSheet.FromReader(reader);
-            }
-
-            lineInfo = (serviceProvider.GetService(typeof(IXmlLineInfoProvider)) as IXmlLineInfoProvider)?.XmlLineInfo;
-            throw new XamlParseException($"StyleSheet require either a Source or a content", lineInfo);
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/Tizen.NUI/src/public/XamlBinding/BindablePropertyConverter.cs b/src/Tizen.NUI/src/public/XamlBinding/BindablePropertyConverter.cs
index f1a409b..a74ede6 100755
--- a/src/Tizen.NUI/src/public/XamlBinding/BindablePropertyConverter.cs
+++ b/src/Tizen.NUI/src/public/XamlBinding/BindablePropertyConverter.cs
@@ -48,12 +48,9 @@ namespace Tizen.NUI.Binding
                 object parent = parentValuesProvider.ParentObjects.Skip(1).FirstOrDefault();
                 if (parentValuesProvider.TargetObject is Setter)
                 {
-                    var style = parent as Style;
                     var triggerBase = parent as TriggerBase;
                     var visualState = parent as VisualState;
-                    if (style != null)
-                        type = style.TargetType;
-                    else if (triggerBase != null)
+                    if (triggerBase != null)
                         type = triggerBase.TargetType;
                     else if (visualState != null)
                         type = FindTypeForVisualState(parentValuesProvider, lineinfo);
@@ -145,13 +142,8 @@ namespace Tizen.NUI.Binding
                 throw new XamlParseException($"Expected {nameof(Setter)} but found {parents[4]}.", lineInfo);
             }
 
-            // These must be part of a Style; verify that 
-            if (!(parents[5] is Style style))
-            {
-                throw new XamlParseException($"Expected {nameof(Style)} but found {parents[5]}.", lineInfo);
-            }
+            throw new XamlParseException("NUI doesn't support VisualState", lineInfo);
 
-            return style.TargetType;
         }
     }
 }
diff --git a/src/Tizen.NUI/src/public/XamlBinding/Registrar.cs b/src/Tizen.NUI/src/public/XamlBinding/Registrar.cs
index 5518b42..42b912c 100755
--- a/src/Tizen.NUI/src/public/XamlBinding/Registrar.cs
+++ b/src/Tizen.NUI/src/public/XamlBinding/Registrar.cs
@@ -216,7 +216,6 @@ namespace Tizen.NUI.Binding.Internals
         }
 
         internal static Dictionary<string, Type> Effects { get; } = new Dictionary<string, Type>();
-        internal static Dictionary<string, StyleSheets.StylePropertyAttribute> StyleProperties { get; } = new Dictionary<string, StyleSheets.StylePropertyAttribute>();
 
         /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
         [EditorBrowsable(EditorBrowsableState.Never)]
diff --git a/src/Tizen.NUI/src/public/XamlBinding/ResourceDictionary.cs b/src/Tizen.NUI/src/public/XamlBinding/ResourceDictionary.cs
index 31c2da3..e7a22ad 100755
--- a/src/Tizen.NUI/src/public/XamlBinding/ResourceDictionary.cs
+++ b/src/Tizen.NUI/src/public/XamlBinding/ResourceDictionary.cs
@@ -120,17 +120,6 @@ namespace Tizen.NUI.Binding
             }
         }
 
-        internal IList<StyleSheets.StyleSheet> StyleSheets { get; set; }
-
-        void StyleSheetsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
-        {
-            switch (e.Action)
-            {
-                case NotifyCollectionChangedAction.Add:
-                    ValuesChanged?.Invoke(this, ResourcesChangedEventArgs.StyleSheets);
-                    break;
-            }
-        }
         IList<ResourceDictionary> _collectionTrack;
 
         void MergedDictionaries_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
@@ -337,21 +326,6 @@ namespace Tizen.NUI.Binding
             remove { ValuesChanged -= value; }
         }
 
-        internal void Add(Style style)
-        {
-            if (string.IsNullOrEmpty(style.Class))
-                Add(style.TargetType.FullName, style);
-            else
-            {
-                IList<Style> classes;
-                object outclasses;
-                if (!TryGetValue(Style.StyleClassPrefix + style.Class, out outclasses) || (classes = outclasses as IList<Style>) == null)
-                    classes = new List<Style>();
-                classes.Add(style);
-                this[Style.StyleClassPrefix + style.Class] = classes;
-            }
-        }
-
         /// This will be public opened in tizen_5.0 after ACR done. Before ACR, need to be hidden as inhouse API.
         [EditorBrowsable(EditorBrowsableState.Never)]
         public void Add(ResourceDictionary mergedResourceDictionary)
@@ -359,13 +333,6 @@ namespace Tizen.NUI.Binding
             MergedDictionaries.Add(mergedResourceDictionary);
         }
 
-        internal void Add(StyleSheets.StyleSheet styleSheet)
-        {
-            StyleSheets = StyleSheets ?? new List<StyleSheets.StyleSheet>(2);
-            StyleSheets.Add(styleSheet);
-            ValuesChanged?.Invoke(this, ResourcesChangedEventArgs.StyleSheets);
-        }
-
         void OnValueChanged(string key, object value)
         {
             OnValuesChanged(new KeyValuePair<string, object>(key, value));
diff --git a/src/Tizen.NUI/src/public/XamlBinding/Style.cs b/src/Tizen.NUI/src/public/XamlBinding/Style.cs
deleted file mode 100755
index 7e406a6..0000000
--- a/src/Tizen.NUI/src/public/XamlBinding/Style.cs
+++ /dev/null
@@ -1,212 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Reflection;
-using Tizen.NUI.StyleSheets;
-using System.ComponentModel;
-
-namespace Tizen.NUI.Binding
-{
-    /// <since_tizen> 6 </since_tizen>
-    /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-    [EditorBrowsable(EditorBrowsableState.Never)]
-    [ContentProperty("Setters")]
-    public sealed class Style : IStyle
-    {
-        internal const string StyleClassPrefix = "Tizen.NUI.Binding.StyleClass.";
-
-        readonly BindableProperty _basedOnResourceProperty = BindableProperty.CreateAttached("BasedOnResource", typeof(Style), typeof(Style), default(Style),
-            propertyChanged: OnBasedOnResourceChanged);
-
-        readonly List<WeakReference<BindableObject>> _targets = new List<WeakReference<BindableObject>>(4);
-
-        Style _basedOnStyle;
-
-        string _baseResourceKey;
-
-        IList<Behavior> _behaviors;
-
-        IList<TriggerBase> _triggers;
-
-        /// <since_tizen> 6 </since_tizen>
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public Style([TypeConverter(typeof(TypeTypeConverter))][Parameter("TargetType")] Type targetType)
-        {
-            if (targetType == null)
-                throw new ArgumentNullException(nameof(targetType));
-
-            TargetType = targetType;
-            Setters = new List<Setter>();
-        }
-
-        /// <since_tizen> 6 </since_tizen>
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public bool ApplyToDerivedTypes { get; set; }
-
-        /// <since_tizen> 6 </since_tizen>
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public Style BasedOn
-        {
-            get { return _basedOnStyle; }
-            set
-            {
-                if (_basedOnStyle == value)
-                    return;
-                if (!ValidateBasedOn(value))
-                    throw new ArgumentException("BasedOn.TargetType is not compatible with TargetType");
-                Style oldValue = _basedOnStyle;
-                _basedOnStyle = value;
-                BasedOnChanged(oldValue, value);
-                if (value != null)
-                    BaseResourceKey = null;
-            }
-        }
-
-        /// <since_tizen> 6 </since_tizen>
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public string BaseResourceKey
-        {
-            get { return _baseResourceKey; }
-            set
-            {
-                if (_baseResourceKey == value)
-                    return;
-                _baseResourceKey = value;
-                //update all DynamicResources
-                foreach (WeakReference<BindableObject> bindableWr in _targets)
-                {
-                    BindableObject target;
-                    if (!bindableWr.TryGetTarget(out target))
-                        continue;
-                    target.RemoveDynamicResource(_basedOnResourceProperty);
-                    if (value != null)
-                        target.SetDynamicResource(_basedOnResourceProperty, value);
-                }
-                if (value != null)
-                    BasedOn = null;
-            }
-        }
-
-        internal IList<Behavior> Behaviors
-        {
-            get { return _behaviors ?? (_behaviors = new AttachedCollection<Behavior>()); }
-        }
-
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public bool CanCascade { get; set; }
-
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public string Class { get; set; }
-
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public IList<Setter> Setters { get; }
-
-        /// This will be public opened in tizen_next after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public IList<TriggerBase> Triggers
-        {
-            get { return _triggers ?? (_triggers = new AttachedCollection<TriggerBase>()); }
-        }
-
-        void IStyle.Apply(BindableObject bindable)
-        {
-            _targets.Add(new WeakReference<BindableObject>(bindable));
-            if (BaseResourceKey != null)
-                bindable.SetDynamicResource(_basedOnResourceProperty, BaseResourceKey);
-            ApplyCore(bindable, BasedOn ?? GetBasedOnResource(bindable));
-        }
-
-        /// <since_tizen> 6 </since_tizen>
-        /// This will be public opened in tizen_6.0 after ACR done. Before ACR, need to be hidden as inhouse API.
-        [EditorBrowsable(EditorBrowsableState.Never)]
-        public Type TargetType { get; }
-
-        void IStyle.UnApply(BindableObject bindable)
-        {
-            UnApplyCore(bindable, BasedOn ?? GetBasedOnResource(bindable));
-            bindable.RemoveDynamicResource(_basedOnResourceProperty);
-            _targets.RemoveAll(wr =>
-            {
-                BindableObject target;
-                return wr.TryGetTarget(out target) && target == bindable;
-            });
-        }
-
-        internal bool CanBeAppliedTo(Type targetType)
-        {
-            if (TargetType == targetType)
-                return true;
-            if (!ApplyToDerivedTypes)
-                return false;
-            do
-            {
-                targetType = targetType.GetTypeInfo().BaseType;
-                if (TargetType == targetType)
-                    return true;
-            } while (targetType != typeof(Element));
-            return false;
-        }
-
-        void ApplyCore(BindableObject bindable, Style basedOn)
-        {
-            if (basedOn != null)
-                ((IStyle)basedOn).Apply(bindable);
-
-            foreach (Setter setter in Setters)
-                setter.Apply(bindable, true);
-            ((AttachedCollection<Behavior>)Behaviors).AttachTo(bindable);
-            ((AttachedCollection<TriggerBase>)Triggers).AttachTo(bindable);
-        }
-
-        void BasedOnChanged(Style oldValue, Style newValue)
-        {
-            foreach (WeakReference<BindableObject> bindableRef in _targets)
-            {
-                BindableObject bindable;
-                if (!bindableRef.TryGetTarget(out bindable))
-                    continue;
-
-                UnApplyCore(bindable, oldValue);
-                ApplyCore(bindable, newValue);
-            }
-        }
-
-        Style GetBasedOnResource(BindableObject bindable)
-        {
-            return (Style)bindable.GetValue(_basedOnResourceProperty);
-        }
-
-        static void OnBasedOnResourceChanged(BindableObject bindable, object oldValue, object newValue)
-        {
-            // Style style = (bindable as /*VisualElement*/BaseHandle).Style;
-            // if (style == null)
-            // 	return;
-            // style.UnApplyCore(bindable, (Style)oldValue);
-            // style.ApplyCore(bindable, (Style)newValue);
-        }
-
-        void UnApplyCore(BindableObject bindable, Style basedOn)
-        {
-            ((AttachedCollection<TriggerBase>)Triggers).DetachFrom(bindable);
-            ((AttachedCollection<Behavior>)Behaviors).DetachFrom(bindable);
-            foreach (Setter setter in Setters)
-                setter.UnApply(bindable, true);
-
-            if (basedOn != null)
-                ((IStyle)basedOn).UnApply(bindable);
-        }
-
-        bool ValidateBasedOn(Style value)
-        {
-            if (value == null)
-                return true;
-            return value.TargetType.IsAssignableFrom(TargetType);
-        }
-    }
-}