Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Data / System / NewXml / RegionIterator.cs / 1305376 / RegionIterator.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- #pragma warning disable 618 // ignore obsolete warning about XmlDataDocument namespace System.Xml { using System; using System.Diagnostics; using System.Text; internal abstract class BaseRegionIterator : BaseTreeIterator { internal BaseRegionIterator( DataSetMapper mapper ) : base( mapper ) { } } // Iterates over non-attribute nodes internal sealed class RegionIterator : BaseRegionIterator { private XmlBoundElement rowElement; private XmlNode currentNode; internal RegionIterator( XmlBoundElement rowElement ) : base( ((XmlDataDocument)(rowElement.OwnerDocument)).Mapper ) { Debug.Assert( rowElement != null && rowElement.Row != null ); this.rowElement = rowElement; this.currentNode = rowElement; } internal override void Reset() { currentNode = rowElement; } internal override XmlNode CurrentNode { get { return currentNode; } } internal override bool Next() { XmlNode nextNode; ElementState oldState = rowElement.ElementState; // We do not want to cause any foliation w/ this iterator or use this iterator once the region was defoliated Debug.Assert( oldState != ElementState.None ); // Try to move to the first child nextNode = currentNode.FirstChild; // No children, try next sibling if ( nextNode != null ) { currentNode = nextNode; // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback foliation rowElement.ElementState = oldState; return true; } return NextRight(); } internal override bool NextRight() { // Make sure we do not get past the rowElement if we call NextRight on a just initialized iterator and rowElement has no children if ( currentNode == rowElement ) { currentNode = null; return false; } ElementState oldState = rowElement.ElementState; // We do not want to cause any foliation w/ this iterator or use this iterator once the region was defoliated Debug.Assert( oldState != ElementState.None ); XmlNode nextNode = currentNode.NextSibling; if ( nextNode != null ) { currentNode = nextNode; // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback foliation rowElement.ElementState = oldState; return true; } // No next sibling, try the first sibling of from the parent chain nextNode = currentNode; while ( nextNode != rowElement && nextNode.NextSibling == null ) nextNode = nextNode.ParentNode; if ( nextNode == rowElement ) { currentNode = null; // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback foliation rowElement.ElementState = oldState; return false; } currentNode = nextNode.NextSibling; Debug.Assert( currentNode != null ); // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback foliation rowElement.ElementState = oldState; return true; } // Get the initial text value for the current node. You should be positioned on the node (element) for // which to get the initial text value, not on the text node. internal bool NextInitialTextLikeNodes( out String value ) { Debug.Assert( this.CurrentNode != null ); Debug.Assert( this.CurrentNode.NodeType == XmlNodeType.Element ); #if DEBUG // It's not OK to try to read the initial text value for sub-regions, because we do not know how to revert their initial state if ( this.CurrentNode.NodeType == XmlNodeType.Element && mapper.GetTableSchemaForElement( (XmlElement)(this.CurrentNode) ) != null ) { if ( this.CurrentNode != rowElement ) Debug.Assert( false ); } #endif ElementState oldState = rowElement.ElementState; // We do not want to cause any foliation w/ this iterator or use this iterator once the region was defoliated Debug.Assert( oldState != ElementState.None ); XmlNode n = this.CurrentNode.FirstChild; value = GetInitialTextFromNodes( ref n ); if ( n == null ) { // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback eventual foliation rowElement.ElementState = oldState; return NextRight(); } Debug.Assert( ! XmlDataDocument.IsTextLikeNode( n ) ); currentNode = n; // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback eventual foliation rowElement.ElementState = oldState; return true; } private static string GetInitialTextFromNodes( ref XmlNode n ) { string value = null; if ( n != null ) { // don't consider whitespace while ( n.NodeType == XmlNodeType.Whitespace ) { n = n.NextSibling; if ( n == null ) return String.Empty; } if ( XmlDataDocument.IsTextLikeNode( n ) && (n.NextSibling == null || ! XmlDataDocument.IsTextLikeNode( n.NextSibling )) ) { // don't use string builder if only one text node exists value = n.Value; n = n.NextSibling; } else { StringBuilder sb = new StringBuilder(); while ( n != null && XmlDataDocument.IsTextLikeNode( n ) ) { // Ignore non-significant whitespace nodes if ( n.NodeType != XmlNodeType.Whitespace ) sb.Append( n.Value ); n = n.NextSibling; } value = sb.ToString(); } } if ( value == null ) value = String.Empty; return value; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //[....] //----------------------------------------------------------------------------- #pragma warning disable 618 // ignore obsolete warning about XmlDataDocument namespace System.Xml { using System; using System.Diagnostics; using System.Text; internal abstract class BaseRegionIterator : BaseTreeIterator { internal BaseRegionIterator( DataSetMapper mapper ) : base( mapper ) { } } // Iterates over non-attribute nodes internal sealed class RegionIterator : BaseRegionIterator { private XmlBoundElement rowElement; private XmlNode currentNode; internal RegionIterator( XmlBoundElement rowElement ) : base( ((XmlDataDocument)(rowElement.OwnerDocument)).Mapper ) { Debug.Assert( rowElement != null && rowElement.Row != null ); this.rowElement = rowElement; this.currentNode = rowElement; } internal override void Reset() { currentNode = rowElement; } internal override XmlNode CurrentNode { get { return currentNode; } } internal override bool Next() { XmlNode nextNode; ElementState oldState = rowElement.ElementState; // We do not want to cause any foliation w/ this iterator or use this iterator once the region was defoliated Debug.Assert( oldState != ElementState.None ); // Try to move to the first child nextNode = currentNode.FirstChild; // No children, try next sibling if ( nextNode != null ) { currentNode = nextNode; // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback foliation rowElement.ElementState = oldState; return true; } return NextRight(); } internal override bool NextRight() { // Make sure we do not get past the rowElement if we call NextRight on a just initialized iterator and rowElement has no children if ( currentNode == rowElement ) { currentNode = null; return false; } ElementState oldState = rowElement.ElementState; // We do not want to cause any foliation w/ this iterator or use this iterator once the region was defoliated Debug.Assert( oldState != ElementState.None ); XmlNode nextNode = currentNode.NextSibling; if ( nextNode != null ) { currentNode = nextNode; // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback foliation rowElement.ElementState = oldState; return true; } // No next sibling, try the first sibling of from the parent chain nextNode = currentNode; while ( nextNode != rowElement && nextNode.NextSibling == null ) nextNode = nextNode.ParentNode; if ( nextNode == rowElement ) { currentNode = null; // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback foliation rowElement.ElementState = oldState; return false; } currentNode = nextNode.NextSibling; Debug.Assert( currentNode != null ); // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback foliation rowElement.ElementState = oldState; return true; } // Get the initial text value for the current node. You should be positioned on the node (element) for // which to get the initial text value, not on the text node. internal bool NextInitialTextLikeNodes( out String value ) { Debug.Assert( this.CurrentNode != null ); Debug.Assert( this.CurrentNode.NodeType == XmlNodeType.Element ); #if DEBUG // It's not OK to try to read the initial text value for sub-regions, because we do not know how to revert their initial state if ( this.CurrentNode.NodeType == XmlNodeType.Element && mapper.GetTableSchemaForElement( (XmlElement)(this.CurrentNode) ) != null ) { if ( this.CurrentNode != rowElement ) Debug.Assert( false ); } #endif ElementState oldState = rowElement.ElementState; // We do not want to cause any foliation w/ this iterator or use this iterator once the region was defoliated Debug.Assert( oldState != ElementState.None ); XmlNode n = this.CurrentNode.FirstChild; value = GetInitialTextFromNodes( ref n ); if ( n == null ) { // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback eventual foliation rowElement.ElementState = oldState; return NextRight(); } Debug.Assert( ! XmlDataDocument.IsTextLikeNode( n ) ); currentNode = n; // If we have been defoliated, we should have stayed that way Debug.Assert( (oldState == ElementState.Defoliated) ? (rowElement.ElementState == ElementState.Defoliated) : true ); // Rollback eventual foliation rowElement.ElementState = oldState; return true; } private static string GetInitialTextFromNodes( ref XmlNode n ) { string value = null; if ( n != null ) { // don't consider whitespace while ( n.NodeType == XmlNodeType.Whitespace ) { n = n.NextSibling; if ( n == null ) return String.Empty; } if ( XmlDataDocument.IsTextLikeNode( n ) && (n.NextSibling == null || ! XmlDataDocument.IsTextLikeNode( n.NextSibling )) ) { // don't use string builder if only one text node exists value = n.Value; n = n.NextSibling; } else { StringBuilder sb = new StringBuilder(); while ( n != null && XmlDataDocument.IsTextLikeNode( n ) ) { // Ignore non-significant whitespace nodes if ( n.NodeType != XmlNodeType.Whitespace ) sb.Append( n.Value ); n = n.NextSibling; } value = sb.ToString(); } } if ( value == null ) value = String.Empty; return value; } } } // 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
- Camera.cs
- SAPIEngineTypes.cs
- PathSegmentCollection.cs
- XmlSchemaSimpleTypeUnion.cs
- followingquery.cs
- ToolBarTray.cs
- SkinBuilder.cs
- ApplicationTrust.cs
- PasswordBoxAutomationPeer.cs
- Italic.cs
- HtmlShim.cs
- RowToFieldTransformer.cs
- HttpCapabilitiesEvaluator.cs
- Regex.cs
- NullableFloatMinMaxAggregationOperator.cs
- ValidationHelpers.cs
- DbMetaDataColumnNames.cs
- dtdvalidator.cs
- GroupStyle.cs
- ResourcePermissionBaseEntry.cs
- ComponentResourceKey.cs
- DbConnectionStringBuilder.cs
- ParagraphResult.cs
- MembershipSection.cs
- ScalarType.cs
- ListViewDeletedEventArgs.cs
- GrabHandleGlyph.cs
- IntegerValidatorAttribute.cs
- UndoManager.cs
- XXXInfos.cs
- RowToFieldTransformer.cs
- ProviderUtil.cs
- XMLDiffLoader.cs
- HotSpotCollection.cs
- _ProxyRegBlob.cs
- WebEventTraceProvider.cs
- FixedSOMPageConstructor.cs
- AssociationEndMember.cs
- SecureConversationServiceCredential.cs
- Thumb.cs
- UserControlAutomationPeer.cs
- PixelShader.cs
- UseManagedPresentationBindingElementImporter.cs
- CheckBoxPopupAdapter.cs
- Query.cs
- MaskedTextBoxDesignerActionList.cs
- Image.cs
- TextServicesCompartment.cs
- COM2AboutBoxPropertyDescriptor.cs
- SymmetricKey.cs
- StyleXamlTreeBuilder.cs
- DiagnosticsConfiguration.cs
- MultipartIdentifier.cs
- DataGridViewCellValidatingEventArgs.cs
- TriggerBase.cs
- XmlILIndex.cs
- CngAlgorithmGroup.cs
- QueryStatement.cs
- EpmContentDeSerializer.cs
- InvokePattern.cs
- URLAttribute.cs
- EncryptedPackageFilter.cs
- TransferRequestHandler.cs
- processwaithandle.cs
- URLString.cs
- WindowsAltTab.cs
- MatrixConverter.cs
- SqlRowUpdatingEvent.cs
- TextFragmentEngine.cs
- IisTraceListener.cs
- XpsFont.cs
- ConfigurationSchemaErrors.cs
- ListChangedEventArgs.cs
- StrongNameKeyPair.cs
- TdsParameterSetter.cs
- TextTreeRootTextBlock.cs
- IsolatedStorageFileStream.cs
- HMACSHA512.cs
- XmlDataImplementation.cs
- WebPartVerb.cs
- GenericWebPart.cs
- CompiledXpathExpr.cs
- ListComponentEditorPage.cs
- VirtualPath.cs
- HTMLTextWriter.cs
- MyContact.cs
- PageEventArgs.cs
- WebBrowserPermission.cs
- CodeIdentifier.cs
- COAUTHINFO.cs
- BamlResourceDeserializer.cs
- WindowsListView.cs
- SQLBinaryStorage.cs
- ObjectViewEntityCollectionData.cs
- ToolStripGrip.cs
- ScriptReferenceEventArgs.cs
- BinaryNegotiation.cs
- FtpWebResponse.cs
- FontConverter.cs
- ScaleTransform.cs