ResourceManagerWrapper.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / MS / Internal / Resources / ResourceManagerWrapper.cs / 1 / ResourceManagerWrapper.cs
                        

                        
                            //------------------------------------------------------------------------------ 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
//  ResourceManagerWrapper is responsbile for getting resource 
//  stream for a given Uri from :
// 
//     A.  Right SatelliteAssembly for localizable resource.
//     B.  Main assembly for non-localizable resource.
//
// History: 
//    06/16/2005:  [....], moved code from ResourceContainer
//                 and change the functionality for this class. 
// 
//-----------------------------------------------------------------------------
 
using System;
using System.IO.Packaging;
using System.IO;
using System.Collections; 
using System.Windows.Resources;
using System.Resources; 
using System.Reflection; 
using System.Globalization;
using MS.Internal.PresentationCore;                   // SafeSecurityHelper 
using System.Windows;

namespace MS.Internal.Resources
{ 
    internal class ResourceManagerWrapper
    { 
        // 
        // Constructor
        // 
        // Take an Assembly instance as input.
        // For a Uri which stands for resource in  main application
        // assembly, this constructor will be called.
        // 
        internal ResourceManagerWrapper(Assembly assembly)
        { 
            _assembly = assembly; 
        }
 
        #region Internal methods

        internal Stream GetStream(string name)
        { 
            Stream stream = null;
 
            // 
            // Try to search the resource from localizable resourceManager.
            // ResourceManager will do all the culture probe-and-fallback work. 
            //
            try
            {
                stream = this.ResourceManager.GetStream(name, CultureInfo.CurrentUICulture); 
            }
            catch (SystemException e) 
            { 
                bool bMissingResource;
 
                bMissingResource = (e is MissingManifestResourceException || e is MissingSatelliteAssemblyException);

                if (!bMissingResource)
                { 
                    throw;
                } 
 
                // If it is missing Resource Manfifest exception, it is possible
                // the resource is in unlocalizable part. catch and eat the 
                // exception here so that the code has chance to search the resource
                // from unlocalizable resource set part.

            } 

            if (stream == null) 
            { 
                // Try to search the unlocalizable resource from Main assembly only.
                if (ResourceSet != null) 
                {
                    try
                    {
                        stream = this.ResourceSet.GetObject(name) as Stream; 
                    }
                    catch (SystemException e) 
                    { 
                        if (!(e is MissingManifestResourceException))
                        { 
                            throw;
                        }

                        // Don't throw exception here. 
                        // If it doesn't return a valid stream, later code GetStreamCore in
                        // ResourcePart will throw exception and let user know what happened 
                        // with more helpful information. 
                        //
                    } 
                }
            }

            return stream; 
        }
 
        #endregion Internal methods 

        #region Internal property 

        internal Assembly Assembly
        {
            get 
            {
                return _assembly; 
            } 
            set
            { 
                _assembly = value;
                _resourceManager = null;
                _resourceSet = null;
                _resourceList = null; 
            }
        } 
 
        //
        // Readonly property 
        // Return a list of resources available in this ResourceManagerWrapper.
        // It contains both localizable and unlocalizable resources.
        //
        internal IList ResourceList 
        {
            get 
            { 
                if (_resourceList == null)
                { 
                    _resourceList = new ArrayList();

                    if (this.ResourceManager != null)
                    { 
                        CultureInfo ciNeutral = GetNeutralResourcesLanguage();
 
                        // ResourceSet for neutral language contains all the available resources 
                        // in this ResourceManager.
                        // 
                        // Set true to the second parameter, createIfNotExists, in GetResourceSet( )
                        //
                        // This is to guarantee that API GetResourceSet( ) can always return ResourceSet
                        // instance for the neutral language. 
                        //
                        // If RM.GetObject or GetStream is called first, ResourceManager can create 
                        // ResourceSet instance for each cutlure and cache them in memory, so later 
                        // GetResourceSet( ) can return right instance no matter what value in second parm.
                        // 
                        // But if GetObject/GetStream is not called first in user's code, and the second parm
                        // is set to false, the resourceSet instance for the language is not available when
                        // this API is called. Even though this API can get the Resource streams internally,
                        // but it would NOT create instance of ResourceSet and return the object because 
                        // createIfNotExists is false.
                        // 
                        ResourceSet rsLoc = this.ResourceManager.GetResourceSet(ciNeutral, true, false); 

                        if (rsLoc != null) 
                        {
                            AddResourceNameToList(rsLoc, ref _resourceList);

                            rsLoc.Close(); 
                        }
                    } 
 
                    if (this.ResourceSet != null)
                    { 
                        // This contains non-localizable resources in Main assembly.

                        AddResourceNameToList(this.ResourceSet, ref _resourceList);
                    } 
                }
 
                return (IList)_resourceList; 
            }
        } 


        #endregion Internal property
 

        #region private methods 
 
        //
        // Get Neutral Resource language for the assembly of this ResourceManagerWrapper 
        //
        private CultureInfo GetNeutralResourcesLanguage( )
        {
            // 
            // If NeutralResourceLanguageAttribute is not set, the resource must be
            // in Main assembly, return CultureInfor.InvariantCulture. 
            // 
            CultureInfo ciNeutral = CultureInfo.InvariantCulture;
 
            NeutralResourcesLanguageAttribute neutralLangAttr = Attribute.GetCustomAttribute(_assembly, typeof(NeutralResourcesLanguageAttribute)) as NeutralResourcesLanguageAttribute;

            if (neutralLangAttr != null)
            { 
                ciNeutral = new CultureInfo(neutralLangAttr.CultureName);
            } 
 
            return ciNeutral;
        } 


        //
        // Add all the availabe resource names in ResourceSet to ArrayList 
        //
        private void AddResourceNameToList(ResourceSet rs, ref ArrayList resourceList) 
        { 
            IDictionaryEnumerator deResources;
 
            deResources = rs.GetEnumerator();

            if (deResources != null)
            { 
                while (deResources.MoveNext())
                { 
                    string resName = deResources.Key as string; 

                    resourceList.Add(resName); 
                }
            }
        }
 
        #endregion private methods
 
 
        #region private properties
 
        //
        // Get ResourceSet for non-localizable resources.
        //
        private ResourceSet ResourceSet 
        {
            get 
            { 
                if (_resourceSet == null)
                { 
                    string manifestResourceName;

                    manifestResourceName = SafeSecurityHelper.GetAssemblyPartialName(_assembly) + UnLocalizableResourceNameSuffix;
 
                    ResourceManager manager = new ResourceManager(manifestResourceName, this._assembly);
                    _resourceSet = manager.GetResourceSet(CultureInfo.InvariantCulture, true, false); 
                } 

                return _resourceSet; 
            }
        }

 
        //
        // Get ResourceManger for the localizable resources. 
        // 
        private ResourceManager ResourceManager
        { 
            get
            {
                if (_resourceManager == null)
                { 
                    string baseResourceName;  // Our build system always generate a resource base name "$(AssemblyShortname).g"
 
                    baseResourceName = SafeSecurityHelper.GetAssemblyPartialName(_assembly) + LocalizableResourceNameSuffix; 

                    _resourceManager = new ResourceManager(baseResourceName, this._assembly); 
                }

                return _resourceManager;
            } 
        }
 
        #endregion private properties 

 
        #region private field

        private ResourceManager _resourceManager = null;  // For localizable resources.
        private ResourceSet     _resourceSet = null;      // For non-localizable resources. 
        private Assembly        _assembly = null;
        private ArrayList       _resourceList = null; 
 
        private const string LocalizableResourceNameSuffix = ".g";
        private const string UnLocalizableResourceNameSuffix = ".unlocalizable.g"; 

        #endregion private field
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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