Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / clr / src / BCL / System / Globalization / TextElementEnumerator.cs / 1 / TextElementEnumerator.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //////////////////////////////////////////////////////////////////////////// // // Class: TextElementEnumerator // // Purpose: // // Date: [....] 31, 1999 // //////////////////////////////////////////////////////////////////////////// using System.Runtime.Serialization; namespace System.Globalization { using System.Collections; // // This is public because GetTextElement() is public. // [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public class TextElementEnumerator: IEnumerator { private String str; private int index; private int startIndex; [NonSerialized] private int strLen; // This is the length of the total string, counting from the beginning of string. [NonSerialized] private int currTextElementLen; // The current text element lenght after MoveNext() is called. [OptionalField(VersionAdded = 2)] private UnicodeCategory uc; [OptionalField(VersionAdded = 2)] private int charLen; // The next abstract char to look at after MoveNext() is called. It could be 1 or 2, depending on if it is a surrogate or not. internal TextElementEnumerator(String str, int startIndex, int strLen) { BCLDebug.Assert(str != null, "TextElementEnumerator(): str != null"); BCLDebug.Assert(startIndex >= 0 && strLen >= 0, "TextElementEnumerator(): startIndex >= 0 && strLen >= 0"); BCLDebug.Assert(strLen >= startIndex, "TextElementEnumerator(): strLen >= startIndex"); this.str = str; this.startIndex = startIndex; this.strLen = strLen; Reset(); } #region Serialization // the following fields is defined to keep the compatibility with Everett. // don't change/remove the names/types of these fields. private int endIndex; private int nextTextElementLen; [OnDeserializing] private void OnDeserializing(StreamingContext ctx) { charLen = -1; } [OnDeserialized] private void OnDeserialized(StreamingContext ctx) { strLen = endIndex + 1; currTextElementLen = nextTextElementLen; if (charLen == -1) { uc = CharUnicodeInfo.InternalGetUnicodeCategory(str, index, out charLen); } } [OnSerializing] private void OnSerializing(StreamingContext ctx) { endIndex = strLen - 1; nextTextElementLen = currTextElementLen; } #endregion Serialization public bool MoveNext() { if (index >= strLen) { // Make the index to be greater than strLen so that we can throw exception if GetTextElement() is called. index = strLen + 1; return (false); } currTextElementLen = StringInfo.GetCurrentTextElementLen(str, index, strLen, ref uc, ref charLen); index += currTextElementLen; return (true); } // // Get the current text element. // public Object Current { get { return (GetTextElement()); } } // // Get the current text element. // public String GetTextElement() { if (index == startIndex) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumNotStarted")); } if (index > strLen) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumEnded")); } return (str.Substring(index - currTextElementLen, currTextElementLen)); } // // Get the starting index of the current text element. // public int ElementIndex { get { if (index == startIndex) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumNotStarted")); } return (index - currTextElementLen); } } public void Reset() { index = startIndex; if (index < strLen) { // If we have more than 1 character, get the category of the current char. uc = CharUnicodeInfo.InternalGetUnicodeCategory(str, index, out charLen); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== //////////////////////////////////////////////////////////////////////////// // // Class: TextElementEnumerator // // Purpose: // // Date: [....] 31, 1999 // //////////////////////////////////////////////////////////////////////////// using System.Runtime.Serialization; namespace System.Globalization { using System.Collections; // // This is public because GetTextElement() is public. // [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public class TextElementEnumerator: IEnumerator { private String str; private int index; private int startIndex; [NonSerialized] private int strLen; // This is the length of the total string, counting from the beginning of string. [NonSerialized] private int currTextElementLen; // The current text element lenght after MoveNext() is called. [OptionalField(VersionAdded = 2)] private UnicodeCategory uc; [OptionalField(VersionAdded = 2)] private int charLen; // The next abstract char to look at after MoveNext() is called. It could be 1 or 2, depending on if it is a surrogate or not. internal TextElementEnumerator(String str, int startIndex, int strLen) { BCLDebug.Assert(str != null, "TextElementEnumerator(): str != null"); BCLDebug.Assert(startIndex >= 0 && strLen >= 0, "TextElementEnumerator(): startIndex >= 0 && strLen >= 0"); BCLDebug.Assert(strLen >= startIndex, "TextElementEnumerator(): strLen >= startIndex"); this.str = str; this.startIndex = startIndex; this.strLen = strLen; Reset(); } #region Serialization // the following fields is defined to keep the compatibility with Everett. // don't change/remove the names/types of these fields. private int endIndex; private int nextTextElementLen; [OnDeserializing] private void OnDeserializing(StreamingContext ctx) { charLen = -1; } [OnDeserialized] private void OnDeserialized(StreamingContext ctx) { strLen = endIndex + 1; currTextElementLen = nextTextElementLen; if (charLen == -1) { uc = CharUnicodeInfo.InternalGetUnicodeCategory(str, index, out charLen); } } [OnSerializing] private void OnSerializing(StreamingContext ctx) { endIndex = strLen - 1; nextTextElementLen = currTextElementLen; } #endregion Serialization public bool MoveNext() { if (index >= strLen) { // Make the index to be greater than strLen so that we can throw exception if GetTextElement() is called. index = strLen + 1; return (false); } currTextElementLen = StringInfo.GetCurrentTextElementLen(str, index, strLen, ref uc, ref charLen); index += currTextElementLen; return (true); } // // Get the current text element. // public Object Current { get { return (GetTextElement()); } } // // Get the current text element. // public String GetTextElement() { if (index == startIndex) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumNotStarted")); } if (index > strLen) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumEnded")); } return (str.Substring(index - currTextElementLen, currTextElementLen)); } // // Get the starting index of the current text element. // public int ElementIndex { get { if (index == startIndex) { throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_EnumNotStarted")); } return (index - currTextElementLen); } } public void Reset() { index = startIndex; if (index < strLen) { // If we have more than 1 character, get the category of the current char. uc = CharUnicodeInfo.InternalGetUnicodeCategory(str, index, out charLen); } } } } // 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
- XmlAttributeCache.cs
- SelectionListDesigner.cs
- ManagedIStream.cs
- PipelineModuleStepContainer.cs
- LogAppendAsyncResult.cs
- UIElementHelper.cs
- GlyphInfoList.cs
- UpdateInfo.cs
- EntityContainerRelationshipSetEnd.cs
- WindowInteropHelper.cs
- GeometryGroup.cs
- ClassDataContract.cs
- FormsAuthenticationCredentials.cs
- ImpersonationContext.cs
- DateTimeConstantAttribute.cs
- EndOfStreamException.cs
- SecureStringHasher.cs
- MediaEntryAttribute.cs
- Deflater.cs
- DataServiceKeyAttribute.cs
- KeyManager.cs
- Int32AnimationUsingKeyFrames.cs
- ObjectAnimationUsingKeyFrames.cs
- TypeInitializationException.cs
- DeviceContext.cs
- MenuCommandService.cs
- SourceFileInfo.cs
- TraceInternal.cs
- ExpressionSelection.cs
- XmlExtensionFunction.cs
- DesignerVerb.cs
- TextContainerChangeEventArgs.cs
- IntermediatePolicyValidator.cs
- XslAstAnalyzer.cs
- AssemblyUtil.cs
- MostlySingletonList.cs
- figurelength.cs
- EditingScopeUndoUnit.cs
- Stacktrace.cs
- SqlRowUpdatedEvent.cs
- ToolStripItemClickedEventArgs.cs
- DataServiceKeyAttribute.cs
- ColorConvertedBitmapExtension.cs
- Compilation.cs
- COM2ExtendedBrowsingHandler.cs
- CodeExpressionRuleDeclaration.cs
- StylusButton.cs
- DesignTimeParseData.cs
- DynamicDataResources.Designer.cs
- PeerHelpers.cs
- ViewService.cs
- CorrelationExtension.cs
- SoapEnumAttribute.cs
- AdjustableArrowCap.cs
- ThreadStartException.cs
- Scheduler.cs
- ControlParameter.cs
- DataServiceContext.cs
- SqlCacheDependency.cs
- DisplayInformation.cs
- SecurityTokenResolver.cs
- CodeRegionDirective.cs
- CollectionBuilder.cs
- DateTimeOffsetStorage.cs
- WebBrowserDocumentCompletedEventHandler.cs
- WebPartVerb.cs
- ToolboxItemWrapper.cs
- StringWriter.cs
- TypeBrowser.xaml.cs
- TextElementEnumerator.cs
- QilPatternFactory.cs
- EDesignUtil.cs
- CallbackValidatorAttribute.cs
- DiscoveryDefaults.cs
- SqlDesignerDataSourceView.cs
- Internal.cs
- GradientStop.cs
- HtmlHistory.cs
- FixedLineResult.cs
- TextTreeTextBlock.cs
- ObjectViewEntityCollectionData.cs
- PrePrepareMethodAttribute.cs
- CompilerGeneratedAttribute.cs
- MetadataExchangeBindings.cs
- NeedSkipTokenVisitor.cs
- CustomError.cs
- CompoundFileIOPermission.cs
- ScrollableControl.cs
- BinHexDecoder.cs
- DesignerToolboxInfo.cs
- TextElementEnumerator.cs
- HashStream.cs
- SByteStorage.cs
- _BufferOffsetSize.cs
- DataTableReaderListener.cs
- MenuCommandService.cs
- WeakEventTable.cs
- _SafeNetHandles.cs
- safelinkcollection.cs
- GatewayIPAddressInformationCollection.cs