Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Core / CSharp / MS / Internal / TextFormatting / CultureMapper.cs / 1305600 / CultureMapper.cs
//------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // // Description: The CultureMapper class implements static methods for mapping // CultureInfo objects from WPF clients to CultureInfo objects // that can be used internally by text formatting code. // // History: // 1-30-2006 : niklasb - Created // //----------------------------------------------------------------------- using System; using System.Globalization; using System.Diagnostics; using MS.Internal.PresentationCore; using System.Windows.Markup; namespace MS.Internal.TextFormatting { ////// Implements static methods for mapping CultureInfo objects. /// internal static class CultureMapper { ////// Returns a specific culture given an arbitrary CultureInfo, which may be null, the invariant /// culture, or a neutral culture. /// public static CultureInfo GetSpecificCulture(CultureInfo runCulture) { // Assume default culture unless we can do better. CultureInfo specificCulture = TypeConverterHelper.InvariantEnglishUS; if (runCulture != null) { // Assign _cachedCultureMap to a local variable for thread safety. The reference assignment // is atomic and the CachedCultureMap class is immutable. CachedCultureMap cachedCultureMap = _cachedCultureMap; if (cachedCultureMap != null && object.ReferenceEquals(cachedCultureMap.OriginalCulture, runCulture)) return cachedCultureMap.SpecificCulture; // Unfortunately we cannot use reference comparison here because, for example, new CultureInfo("") // creates an invariant culture which (being a new object) is obviously not the same instance as // CultureInfo.InvariantCulture. if (runCulture != CultureInfo.InvariantCulture) { if (!runCulture.IsNeutralCulture) { // It's already a specific culture (neither neutral nor InvariantCulture) specificCulture = runCulture; } else { // Get the culture name. Note that the string expected by CreateSpecificCulture corresponds // to the Name property, not IetfLanguageTag, so that's what we use. string cultureName = runCulture.Name; if (!string.IsNullOrEmpty(cultureName)) { try { CultureInfo culture = CultureInfo.CreateSpecificCulture(cultureName); specificCulture = SafeSecurityHelper.GetCultureInfoByIetfLanguageTag(culture.IetfLanguageTag); } catch (ArgumentException) { // This exception occurs if the culture name is invalid or has no corresponding specific // culture. we can safely ignore the exception and fall back to TypeConverterHelper.InvariantEnglishUS. specificCulture = TypeConverterHelper.InvariantEnglishUS; } } } } // Save the mapping so the next call will be fast if we're given the same runCulture. // Again, the reference assignment is atomic so this is thread safe. _cachedCultureMap = new CachedCultureMap(runCulture, specificCulture); } return specificCulture; } private class CachedCultureMap { public CachedCultureMap(CultureInfo originalCulture, CultureInfo specificCulture) { _originalCulture = originalCulture; _specificCulture = specificCulture; } ////// Original CultureInfo object from text formatting client; could be the invariant culture, /// a neutral culture, or a specific culture. /// public CultureInfo OriginalCulture { get { return _originalCulture; } } ////// CultureInfo object to use for text formatting. This is guaranteed to be a specific (i.e., /// neither neutral nor invariant) culture. It may be the same object as OriginalCulture if /// the latter is already a specific culture. /// public CultureInfo SpecificCulture { get { return _specificCulture; } } private CultureInfo _originalCulture; private CultureInfo _specificCulture; } private static CachedCultureMap _cachedCultureMap = null; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- StrokeDescriptor.cs
- ConstructorBuilder.cs
- XmlChildNodes.cs
- XmlSchemaImport.cs
- ObjectQuery.cs
- CellLabel.cs
- ConfigXmlCDataSection.cs
- SqlConnectionManager.cs
- Module.cs
- ClientBase.cs
- Constant.cs
- MasterPage.cs
- ConnectionOrientedTransportBindingElement.cs
- MachineKeySection.cs
- HttpCapabilitiesBase.cs
- SocketInformation.cs
- X509Certificate.cs
- ResourcePermissionBaseEntry.cs
- PropertyToken.cs
- OracleCommand.cs
- AssemblyInfo.cs
- AppDomainUnloadedException.cs
- RangeValuePattern.cs
- SQLDateTime.cs
- WindowsStatusBar.cs
- PropertyDescriptor.cs
- DataGridViewRowStateChangedEventArgs.cs
- WebEvents.cs
- ServicePointManager.cs
- SQLBinary.cs
- UdpReplyToBehavior.cs
- StrokeRenderer.cs
- EndOfStreamException.cs
- BitmapEffectOutputConnector.cs
- CommandEventArgs.cs
- Span.cs
- TypefaceMap.cs
- SoapCommonClasses.cs
- ProtectedProviderSettings.cs
- TriState.cs
- SuppressIldasmAttribute.cs
- Publisher.cs
- DragStartedEventArgs.cs
- DelegateSerializationHolder.cs
- SplineQuaternionKeyFrame.cs
- TextClipboardData.cs
- DrawingAttributesDefaultValueFactory.cs
- DesignParameter.cs
- BooleanSwitch.cs
- DataGridPageChangedEventArgs.cs
- WebPartDescription.cs
- SHA512Managed.cs
- SafeTimerHandle.cs
- VirtualizingStackPanel.cs
- DateTimeParse.cs
- SiteMapPath.cs
- TextDecorationLocationValidation.cs
- EntityDataSourceDesigner.cs
- ListView.cs
- HttpResponseWrapper.cs
- MimeMapping.cs
- Mutex.cs
- PartialCachingAttribute.cs
- BindToObject.cs
- QueryContinueDragEvent.cs
- ParseElementCollection.cs
- StandardCommands.cs
- WmlTextViewAdapter.cs
- DoWorkEventArgs.cs
- CompareValidator.cs
- DataExpression.cs
- nulltextcontainer.cs
- StaticTextPointer.cs
- XmlDataSource.cs
- InternalConfigSettingsFactory.cs
- DSASignatureFormatter.cs
- HttpChannelListener.cs
- ListManagerBindingsCollection.cs
- Helper.cs
- XmlWrappingWriter.cs
- ServicePointManagerElement.cs
- InteropAutomationProvider.cs
- exports.cs
- UrlParameterWriter.cs
- ConstructorArgumentAttribute.cs
- FreezableDefaultValueFactory.cs
- Brush.cs
- PeerConnector.cs
- HttpModuleCollection.cs
- TextServicesManager.cs
- AnnotationResource.cs
- ChannelBuilder.cs
- Substitution.cs
- ListBindableAttribute.cs
- MetaChildrenColumn.cs
- PopupRoot.cs
- ParenthesizePropertyNameAttribute.cs
- ApplicationDirectory.cs
- SubclassTypeValidator.cs
- complextypematerializer.cs