Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Core / CSharp / MS / Internal / TextFormatting / CultureMapper.cs / 1 / 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; 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 = DefaultTextCulture; 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 DefaultTextCulture. specificCulture = DefaultTextCulture; } } } } // 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 readonly CultureInfo DefaultTextCulture = CultureInfo.GetCultureInfoByIetfLanguageTag("en-US"); private static CachedCultureMap _cachedCultureMap = null; } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------ // // 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; 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 = DefaultTextCulture; 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 DefaultTextCulture. specificCulture = DefaultTextCulture; } } } } // 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 readonly CultureInfo DefaultTextCulture = CultureInfo.GetCultureInfoByIetfLanguageTag("en-US"); 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
- SafeProcessHandle.cs
- BinaryConverter.cs
- XPathDocumentBuilder.cs
- WebPartConnectionsDisconnectVerb.cs
- DefaultTraceListener.cs
- CredentialCache.cs
- Trace.cs
- TdsParserStateObject.cs
- PassportPrincipal.cs
- Int32EqualityComparer.cs
- XmlSchemaGroupRef.cs
- DataGridAddNewRow.cs
- InternalConfigEventArgs.cs
- SoapEnumAttribute.cs
- Fonts.cs
- Rules.cs
- DataBoundControlHelper.cs
- ArgumentOutOfRangeException.cs
- CustomError.cs
- Material.cs
- ExecutionScope.cs
- WindowsListViewItemCheckBox.cs
- ConstrainedDataObject.cs
- OperatingSystem.cs
- WorkflowFileItem.cs
- externdll.cs
- Compilation.cs
- ReferenceService.cs
- ProfilePropertyNameValidator.cs
- MenuItem.cs
- CollectionContainer.cs
- CodeVariableReferenceExpression.cs
- DoubleKeyFrameCollection.cs
- CommentAction.cs
- HttpCacheVaryByContentEncodings.cs
- GenericEnumConverter.cs
- ObjectHelper.cs
- DrawingVisual.cs
- RegexCaptureCollection.cs
- UrlPropertyAttribute.cs
- PerfCounterSection.cs
- SrgsText.cs
- WorkflowServiceNamespace.cs
- DataFormats.cs
- ToolStripDropDown.cs
- TextBlock.cs
- MimeReflector.cs
- XmlReflectionMember.cs
- BooleanAnimationUsingKeyFrames.cs
- ThreadStartException.cs
- PropertyEntry.cs
- WebPartEditorApplyVerb.cs
- __Error.cs
- HandleCollector.cs
- CancelAsyncOperationRequest.cs
- TimeSpan.cs
- TypedElement.cs
- ZoomPercentageConverter.cs
- DbProviderFactory.cs
- NetNamedPipeBindingElement.cs
- UpdateCompiler.cs
- BaseTreeIterator.cs
- ClientApiGenerator.cs
- XmlName.cs
- WebServiceMethodData.cs
- WSHttpBinding.cs
- PrivilegeNotHeldException.cs
- HuffmanTree.cs
- LeaseManager.cs
- CodeNamespaceCollection.cs
- TextElementEnumerator.cs
- MetafileHeaderWmf.cs
- LinqDataSourceDisposeEventArgs.cs
- BoundColumn.cs
- SystemIPInterfaceStatistics.cs
- EdmSchemaAttribute.cs
- Size.cs
- FunctionDetailsReader.cs
- MailSettingsSection.cs
- DocumentViewerBaseAutomationPeer.cs
- XPathItem.cs
- DateTimeUtil.cs
- EventSinkHelperWriter.cs
- RegexTypeEditor.cs
- AsyncResult.cs
- FlowDocument.cs
- TabPanel.cs
- ExpandedWrapper.cs
- XmlSchemaSet.cs
- XamlPointCollectionSerializer.cs
- SemanticResultValue.cs
- InputLanguageEventArgs.cs
- SessionEndingEventArgs.cs
- ExpressionNode.cs
- Button.cs
- WebBrowserDocumentCompletedEventHandler.cs
- PointAnimationBase.cs
- VideoDrawing.cs
- Point3DAnimationUsingKeyFrames.cs
- EncryptedKey.cs