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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
//
// 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.
//
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
}
}
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