ResXFileRef.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / WinForms / Managed / System / Resources / ResXFileRef.cs / 1305376 / ResXFileRef.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

#if SYSTEM_WEB  // See DevDiv 9030 
namespace System.PrivateResources { 
#else
namespace System.Resources { 
#endif

    using System.Diagnostics;
    using System.Diagnostics.CodeAnalysis; 

    using System; 
    using System.Windows.Forms; 
    using System.Reflection;
    using Microsoft.Win32; 
    using System.Drawing;
    using System.IO;
    using System.ComponentModel;
    using System.Collections; 
    using System.Resources;
    using System.Text; 
    using System.Globalization; 
    using System.Runtime.Serialization;
    using System.Runtime.Versioning; 

    /// 
    /// 
    ///     ResX File Reference class. This allows the developer to represent 
    ///     a link to an external resource. When the resource manager asks
    ///     for the value of the resource item, the external resource is loaded. 
    ///  
    [TypeConverterAttribute(typeof(ResXFileRef.Converter)), Serializable]
    [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.InheritanceDemand, Name="FullTrust")] 
    [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Name="FullTrust")]
#if SYSTEM_WEB
    internal class ResXFileRef {
#else 
    public class ResXFileRef {
#endif 
        private string fileName; 
        private string typeName;
        [OptionalField(VersionAdded = 2)] 
        private Encoding textFileEncoding;

        /// 
        ///  
        ///     Creates a new ResXFileRef that points to the specified file.
        ///     The type refered to by typeName must support a constructor 
        ///     that accepts a System.IO.Stream as a parameter. 
        /// 
        public ResXFileRef(string fileName, string typeName) { 
            if(fileName == null) {
                throw (new ArgumentNullException("fileName"));
            }
            if(typeName == null) { 
                throw (new ArgumentNullException("typeName"));
            } 
            this.fileName = fileName; 
            this.typeName = typeName;
        } 


        [OnDeserializing]
        private void OnDeserializing(StreamingContext ctx) { 
            textFileEncoding = null;
        } 
 
        [SuppressMessage("Microsoft.Performance", "CA1822:MarkMethodsAsStatic")]
        [OnDeserialized] 
        private void OnDeserialized(StreamingContext ctx) {
        }

        ///  
        /// 
        ///     Creates a new ResXFileRef that points to the specified file. 
        ///     The type refered to by typeName must support a constructor 
        ///     that accepts a System.IO.Stream as a parameter.
        ///  
        public ResXFileRef(string fileName, string typeName, Encoding textFileEncoding) : this(fileName, typeName)  {
            this.textFileEncoding = textFileEncoding;
        }
 
        internal ResXFileRef Clone() {
            return new ResXFileRef(fileName, typeName, textFileEncoding); 
        } 

 
        /// 
        /// 
        ///    [To be supplied.]
        ///  
        public string FileName {
            get { 
                return fileName; 
            }
        } 

        /// 
        /// 
        ///    [To be supplied.] 
        /// 
        public string TypeName { 
            get { 
                return typeName;
            } 
        }

        /// 
        ///  
        ///    [To be supplied.]
        ///  
        public Encoding TextFileEncoding { 
            get {
                return textFileEncoding; 
            }
        }

 
        /// 
        ///  
        ///    path1+result = path2 
        ///   A string which is the relative path difference between path1 and
        ///  path2 such that if path1 and the calculated difference are used 
        ///  as arguments to Combine(), path2 is returned
        /// 
        private static string PathDifference(string path1, string path2, bool compareCase) {
            int i; 
            int si = -1;
 
            for (i = 0; (i < path1.Length) && (i < path2.Length); ++i) { 
                if ((path1[i] != path2[i]) && (compareCase || (Char.ToLower(path1[i], CultureInfo.InvariantCulture) != Char.ToLower(path2[i], CultureInfo.InvariantCulture))))
                { 
                    break;

                } else if (path1[i] == Path.DirectorySeparatorChar) {
                    si = i; 
                }
            } 
 
            if (i == 0) {
                return path2; 
            }
            if ((i == path1.Length) && (i == path2.Length)) {
                return String.Empty;
            } 

            StringBuilder relPath = new StringBuilder(); 
 
            for (; i < path1.Length; ++i) {
                if (path1[i] == Path.DirectorySeparatorChar) { 
                    relPath.Append(".."+Path.DirectorySeparatorChar);
                }
            }
            return relPath.ToString() + path2.Substring(si + 1); 
        }
 
 
        internal void MakeFilePathRelative(string basePath) {
 
            if(basePath==null || basePath.Length == 0) {
                return;
            }
            fileName = PathDifference(basePath, fileName, false); 
        }
 
        ///  
        /// 
        ///    [To be supplied.] 
        /// 
        public override string ToString() {
            string result = "";
 
            if(fileName.IndexOf(";") != -1 || fileName.IndexOf("\"") != -1) {
                result += ("\""+ fileName + "\";"); 
            } else { 
                result += (fileName + ";");
            } 
            result += typeName;
            if(textFileEncoding != null) {
                result += (";" + textFileEncoding.WebName);
            } 
            return result;
        } 
 

 

        /// 
        /// 
        ///    [To be supplied.] 
        /// 
        [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.InheritanceDemand, Name="FullTrust")] 
        [System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Name="FullTrust")] 
        public class Converter : TypeConverter {
            ///  
            /// 
            ///    [To be supplied.]
            /// 
            public override bool CanConvertFrom(ITypeDescriptorContext context, 
                                                Type sourceType) {
                if (sourceType == typeof(string)) { 
                    return true; 
                }
                return false; 
            }

            /// 
            ///  
            ///    [To be supplied.]
            ///  
            public override bool CanConvertTo(ITypeDescriptorContext context, 
                                              Type destinationType) {
                if (destinationType == typeof(string)) { 
                    return true;
                }
                return false;
            } 

            ///  
            ///  
            ///    [To be supplied.]
            ///  
            public override Object ConvertTo(ITypeDescriptorContext context,
                                             CultureInfo culture,
                                             Object value,
                                             Type destinationType) { 
                Object created = null;
                if (destinationType == typeof(string)) { 
                    created = ((ResXFileRef)value).ToString(); 
                }
                return created; 
            }

            // "value" is the parameter name of ConvertFrom, which calls this method.
            [SuppressMessage("Microsoft.Globalization", "CA1303:DoNotPassLiteralsAsLocalizedParameters")] 
            internal static string[] ParseResxFileRefString(string stringValue) {
                string[] result = null; 
                if(stringValue != null ) { 
                    stringValue = stringValue.Trim();
                    string fileName; 
                    string remainingString;
                    if(stringValue.StartsWith("\"")) {
                        int lastIndexOfQuote = stringValue.LastIndexOf("\"");
                        if (lastIndexOfQuote-1<0) 
                            throw new ArgumentException("value");
                        fileName = stringValue.Substring(1, lastIndexOfQuote-1); // remove the quotes in" ..... " 
                        if(lastIndexOfQuote+2>stringValue.Length) 
                            throw new ArgumentException("value");
                        remainingString = stringValue.Substring(lastIndexOfQuote+2); 
                    } else {
                        int nextSemiColumn = stringValue.IndexOf(";");
                        if(nextSemiColumn == -1)
                            throw new ArgumentException("value"); 
                        fileName = stringValue.Substring(0,nextSemiColumn);
                        if(nextSemiColumn+1>stringValue.Length) 
                            throw new ArgumentException("value"); 
                        remainingString = stringValue.Substring(nextSemiColumn+1);
                    } 
                    string[] parts = remainingString.Split(new char[] {';'});
                    if(parts.Length > 1) {
                        result = new string[] { fileName, parts[0], parts[1] };
                    } else if(parts.Length > 0) { 
                        result = new string[] { fileName, parts[0] };
                    } else { 
                        result = new string[] { fileName }; 
                    }
                } 
                return result;
            }

            ///  
            /// 
            ///    [To be supplied.] 
            ///  
            [ResourceExposure(ResourceScope.Machine)]
            [ResourceConsumption(ResourceScope.Machine)] 
            public override Object ConvertFrom(ITypeDescriptorContext context,
                                               CultureInfo culture,
                                               Object value) {
                Object created = null; 
                string stringValue = value as string;
                if (stringValue != null) { 
                    string[] parts = ResXFileRef.Converter.ParseResxFileRefString(stringValue); 
                    string fileName = parts[0];
                    Type toCreate = Type.GetType(parts[1], true); 

                    // special case string and byte[]
                    if(toCreate.Equals(typeof(string))) {
                        // we have a string, now we need to check the encoding 
                        Encoding textFileEncoding = Encoding.Default;
                        if(parts.Length > 2) { 
                            textFileEncoding = Encoding.GetEncoding(parts[2]); 
                        }
                        using (StreamReader sr = new StreamReader(fileName, textFileEncoding)) { 
                            created = sr.ReadToEnd();
                        }
                    } else {
 
                        // this is a regular file, we call it's constructor with a stream as a parameter
                        // or if it's a byte array we just return that 
                        byte[] temp = null; 

                        using (FileStream s = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read)) { 
                            Debug.Assert(s != null, "Couldn't open " + fileName);
                            temp = new byte[s.Length];
                            s.Read(temp, 0, (int)s.Length);
                        } 

                        if(toCreate.Equals(typeof(byte[]))) { 
                            created = temp; 
                        } else {
                            MemoryStream memStream = new MemoryStream(temp); 
                            if(toCreate.Equals(typeof(MemoryStream))) {
                                return memStream;
                            } else if(toCreate.Equals(typeof(System.Drawing.Bitmap)) && fileName.EndsWith(".ico")) {
                                // we special case the .ico bitmaps because GDI+ destroy the alpha channel component and 
                                // we don't want that to happen
                                Icon ico = new Icon(memStream); 
                                created = ico.ToBitmap(); 
                            } else {
                                created = Activator.CreateInstance(toCreate, BindingFlags.Instance | BindingFlags.Public | BindingFlags.CreateInstance, null, new Object[] {memStream}, null); 
                            }
                        }
                    }
                } 
                return created;
            } 
 
        }
    } 
}



// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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ResXFileRef.cs source code in C# .NET

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