SystemKeyConverter.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / SystemKeyConverter.cs / 1305600 / SystemKeyConverter.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// File: SystemKeyConverter.cs
//
// Description: 
//   TypeConverter for SystemResourceKey and SystemThemeKey.
// 
// Copyright (C) 2003 by Microsoft Corporation.  All rights reserved. 
//
//--------------------------------------------------------------------------- 

using System;
using System.ComponentModel;
using System.Globalization; 
using System.ComponentModel.Design.Serialization;
using System.Windows.Controls; 
using System.Windows.Controls.Primitives; 

namespace System.Windows.Markup 
{
    /// 
    ///     Common TypeConverter functionality SystemThemeKey and SystemResourceKey; each
    ///     is an internal type, so gets serialized as an {x:Static} reference. 
    /// 
 
    internal class SystemKeyConverter : TypeConverter 
    {
        ///  
        ///     TypeConverter method override.
        /// 
        /// 
        ///     ITypeDescriptorContext 
        /// 
        ///  
        ///     Type to convert from 
        /// 
        ///  
        ///     true if conversion is possible
        /// 
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        { 
            if (sourceType == null)
            { 
                throw new ArgumentNullException("sourceType"); 
            }
 
            return base.CanConvertFrom(context, sourceType);
        }

        ///  
        ///     TypeConverter method override.
        ///  
        ///  
        ///     ITypeDescriptorContext
        ///  
        /// 
        ///     Type to convert to
        /// 
        ///  
        ///     true if conversion is possible
        ///  
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) 
        {
            // Validate Input Arguments 
            if (destinationType == null)
            {
                throw new ArgumentNullException("destinationType");
            } 
            else if( destinationType == typeof(MarkupExtension) && context is IValueSerializerContext  )
            { 
                return true; 
            }
 
            return base.CanConvertTo(context, destinationType);
        }

        ///  
        ///     TypeConverter method implementation.
        ///  
        ///  
        ///     ITypeDescriptorContext
        ///  
        /// 
        ///     current culture (see CLR specs)
        /// 
        ///  
        ///     value to convert from
        ///  
        ///  
        ///     value that is result of conversion
        ///  
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            return base.ConvertFrom(context, culture, value);
        } 

        ///  
        ///     TypeConverter method implementation. 
        /// 
        ///  
        ///     ITypeDescriptorContext
        /// 
        /// 
        ///     current culture (see CLR specs) 
        /// 
        ///  
        ///     value to convert from 
        /// 
        ///  
        ///     Type to convert to
        /// 
        /// 
        ///     converted value 
        /// 
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) 
        { 

            // Input validation 

            if (destinationType == null)
            {
                throw new ArgumentNullException("destinationType"); 
            }
 
 
            if (destinationType == typeof(MarkupExtension)
                && 
                CanConvertTo(context, destinationType) )
            {
                SystemResourceKeyID keyId;
 
                // Get the SystemResourceKeyID
 
                if( value is SystemResourceKey ) 
                {
                    keyId = (value as SystemResourceKey).InternalKey; 
                }
                else if( value is SystemThemeKey )
                {
                    keyId = (value as SystemThemeKey).InternalKey; 
                }
                else 
                { 
                    throw new ArgumentException(SR.Get(SRID.MustBeOfType, "value", "SystemResourceKey or SystemThemeKey"));
                } 

                // System resource keys can be converted into a MarkupExtension (StaticExtension)

                Type keyType = SystemKeyConverter.GetSystemClassType(keyId); 

                // Get the value serialization context 
                IValueSerializerContext valueSerializerContext = context as IValueSerializerContext; 
                if( valueSerializerContext != null )
                { 
                    // And from that get a System.Type serializer
                    ValueSerializer typeSerializer = valueSerializerContext.GetValueSerializerFor(typeof(Type));
                    if( typeSerializer != null )
                    { 
                        // And use that to create the string-ized class name
                        string systemClassName = typeSerializer.ConvertToString(keyType, valueSerializerContext); 
 
                        // And finally create the StaticExtension.
                        return new StaticExtension( systemClassName + "." + GetSystemKeyName(keyId) ); 
                    }
                }
            }
 
            return base.CanConvertTo(context, destinationType);
        } 
 

 
        internal static Type GetSystemClassType(SystemResourceKeyID id)
        {
            if ((SystemResourceKeyID.InternalSystemColorsStart < id) &&
                (id < SystemResourceKeyID.InternalSystemColorsEnd)) 
            {
                return typeof(SystemColors); 
            } 
            else if ((SystemResourceKeyID.InternalSystemFontsStart < id) &&
                     (id < SystemResourceKeyID.InternalSystemFontsEnd)) 
            {
                return typeof(SystemFonts);
            }
            else if ((SystemResourceKeyID.InternalSystemParametersStart < id) && 
                     (id < SystemResourceKeyID.InternalSystemParametersEnd))
            { 
                return typeof(SystemParameters); 
            }
            else if (SystemResourceKeyID.MenuItemSeparatorStyle == id) 
            {
                return typeof(MenuItem);
            }
            else if ((SystemResourceKeyID.ToolBarButtonStyle <= id) && 
                     (id <= SystemResourceKeyID.ToolBarMenuStyle))
            { 
                return typeof(ToolBar); 
            }
            else if (SystemResourceKeyID.StatusBarSeparatorStyle == id) 
            {
                return typeof(StatusBar);
            }
            else if ((SystemResourceKeyID.GridViewScrollViewerStyle <= id) && 
                     (id <= SystemResourceKeyID.GridViewItemContainerStyle))
            { 
                return typeof(GridView); 
            }
 
            return null;
        }

        internal static string GetSystemClassName(SystemResourceKeyID id) 
        {
            if ((SystemResourceKeyID.InternalSystemColorsStart < id) && 
                (id < SystemResourceKeyID.InternalSystemColorsEnd)) 
            {
                return "SystemColors"; 
            }
            else if ((SystemResourceKeyID.InternalSystemFontsStart < id) &&
                     (id < SystemResourceKeyID.InternalSystemFontsEnd))
            { 
                return "SystemFonts";
            } 
            else if ((SystemResourceKeyID.InternalSystemParametersStart < id) && 
                     (id < SystemResourceKeyID.InternalSystemParametersEnd))
            { 
                return "SystemParameters";
            }
            else if (SystemResourceKeyID.MenuItemSeparatorStyle == id)
            { 
                return "MenuItem";
            } 
            else if ((SystemResourceKeyID.ToolBarButtonStyle <= id) && 
                     (id <= SystemResourceKeyID.ToolBarMenuStyle))
            { 
                return "ToolBar";
            }
            else if (SystemResourceKeyID.StatusBarSeparatorStyle == id)
            { 
                return "StatusBar";
            } 
            else if ((SystemResourceKeyID.GridViewScrollViewerStyle <= id) && 
                     (id <= SystemResourceKeyID.GridViewItemContainerStyle))
            { 
                return "GridView";
            }

            return String.Empty; 
        }
 
        internal static string GetSystemKeyName(SystemResourceKeyID id) 
        {
            if (((SystemResourceKeyID.InternalSystemColorsStart < id) && 
                 (id < SystemResourceKeyID.InternalSystemParametersEnd)) ||
                ((SystemResourceKeyID.GridViewScrollViewerStyle <= id) &&
                 (id <= SystemResourceKeyID.GridViewItemContainerStyle)))
            { 
                return Enum.GetName(typeof(SystemResourceKeyID), id) + "Key";
            } 
            else if (SystemResourceKeyID.MenuItemSeparatorStyle == id || 
                     SystemResourceKeyID.StatusBarSeparatorStyle == id)
            { 
                return "SeparatorStyleKey";
            }
            else if ((SystemResourceKeyID.ToolBarButtonStyle <= id) &&
                     (id <= SystemResourceKeyID.ToolBarMenuStyle)) 
            {
                string propName = Enum.GetName(typeof(SystemResourceKeyID), id) + "Key"; 
                return propName.Remove(0, 7); // Remove the "ToolBar" prefix 
            }
 
            return String.Empty;
        }

        internal static string GetSystemPropertyName(SystemResourceKeyID id) 
        {
            if ((SystemResourceKeyID.InternalSystemColorsStart < id) && 
                (id < SystemResourceKeyID.InternalSystemParametersEnd)) 
            {
                return Enum.GetName(typeof(SystemResourceKeyID), id); 
            }

            return String.Empty;
        } 

 
    } 

} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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SystemKeyConverter.cs source code in C# .NET

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