Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Xml / System / Xml / XPath / Internal / CacheChildrenQuery.cs / 1305376 / CacheChildrenQuery.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //----------------------------------------------------------------------------- namespace MS.Internal.Xml.XPath { using System; using System.Xml; using System.Xml.XPath; using System.Diagnostics; using System.Globalization; using System.Collections.Generic; using StackInt = ClonableStack; using StackNav = ClonableStack ; // This class implements Children axis on Ancestor & Descendant imputs. (as well as id(), preciding, following) // The problem here is that is descenant::*/child::* and ancestor::*/child::* can produce duplicates nodes // The algorithm havily uses the fact that in our implementation of both AncestorQuery and DecsndantQuery return nodes in document order. // As result first child is always before or equal of next input. // So we don't need to call DecideNextNode() when needInput == true && stack is empty. internal sealed class CacheChildrenQuery : ChildrenQuery { XPathNavigator nextInput = null; StackNav elementStk; StackInt positionStk; bool needInput; #if DEBUG XPathNavigator lastNode = null; #endif public CacheChildrenQuery(Query qyInput, string name, string prefix, XPathNodeType type) : base(qyInput, name, prefix, type) { this.elementStk = new StackNav(); this.positionStk = new StackInt(); this.needInput = true; } private CacheChildrenQuery(CacheChildrenQuery other) : base(other) { this.nextInput = Clone(other.nextInput); this.elementStk = other.elementStk.Clone(); this.positionStk = other.positionStk.Clone(); this.needInput = other.needInput; #if DEBUG this.lastNode = Clone(other.lastNode); #endif } public override void Reset() { nextInput = null; elementStk.Clear(); positionStk.Clear(); needInput = true; base.Reset(); #if DEBUG lastNode = null; #endif } public override XPathNavigator Advance() { do { if (needInput) { if (elementStk.Count == 0) { currentNode = GetNextInput(); if (currentNode == null) { return null; } if (!currentNode.MoveToFirstChild()) { continue; } position = 0; } else { currentNode = elementStk .Pop(); position = positionStk.Pop(); if (!DecideNextNode()) { continue; } } needInput = false; } else { if (!currentNode.MoveToNext() || !DecideNextNode()) { needInput = true; continue; } } #if DEBUG if (lastNode != null) { if (currentNode.GetType().ToString() == "Microsoft.VisualStudio.Modeling.StoreNavigator") { XmlNodeOrder order = CompareNodes(lastNode, currentNode); Debug.Assert(order == XmlNodeOrder.Before, "Algorith error. Nodes expected to be DocOrderDistinct"); } } lastNode = currentNode.Clone(); #endif if (matches(currentNode)) { position++; return currentNode; } } while (true); } // Advance private bool DecideNextNode() { nextInput = GetNextInput(); if (nextInput != null) { if (CompareNodes(currentNode, nextInput) == XmlNodeOrder.After) { elementStk .Push(currentNode); positionStk.Push(position); currentNode = nextInput; nextInput = null; if (!currentNode.MoveToFirstChild()) { return false; } position = 0; } } return true; } private XPathNavigator GetNextInput() { XPathNavigator result; if (nextInput != null) { result = nextInput; nextInput = null; } else { result = qyInput.Advance(); if (result != null) { result = result.Clone(); } } return result; } public override XPathNodeIterator Clone() { return new CacheChildrenQuery(this); } } // Children Query} } // 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
- ColorAnimation.cs
- RenderDataDrawingContext.cs
- DesignerWidgets.cs
- DataObjectEventArgs.cs
- DocumentGridPage.cs
- PropagatorResult.cs
- MatrixAnimationUsingPath.cs
- SecurityCriticalDataForSet.cs
- VarRefManager.cs
- TemplateInstanceAttribute.cs
- LocalizedNameDescriptionPair.cs
- PathParser.cs
- AxDesigner.cs
- CompiledRegexRunnerFactory.cs
- HtmlForm.cs
- Object.cs
- _LocalDataStoreMgr.cs
- WebPartCloseVerb.cs
- ObjectConverter.cs
- AuthenticationModuleElementCollection.cs
- PrimitiveDataContract.cs
- TextSelectionProcessor.cs
- dsa.cs
- RtfToken.cs
- ContentFileHelper.cs
- dsa.cs
- HandledEventArgs.cs
- ExtendedPropertyDescriptor.cs
- SoapSchemaImporter.cs
- SiteMembershipCondition.cs
- NavigationWindowAutomationPeer.cs
- WSHttpBindingBase.cs
- ClickablePoint.cs
- CompModSwitches.cs
- TemplateControlParser.cs
- FileLogRecordStream.cs
- AmbiguousMatchException.cs
- RotateTransform.cs
- DesignerCapabilities.cs
- JournalEntryStack.cs
- EnumValAlphaComparer.cs
- HtmlUtf8RawTextWriter.cs
- ColumnBinding.cs
- ScriptMethodAttribute.cs
- PasswordBoxAutomationPeer.cs
- __Filters.cs
- ScriptReferenceBase.cs
- WindowsEditBoxRange.cs
- FormsAuthenticationUser.cs
- RepeaterItemCollection.cs
- RbTree.cs
- HtmlControlPersistable.cs
- HttpResponse.cs
- SapiRecognizer.cs
- CellParaClient.cs
- GatewayDefinition.cs
- InsufficientMemoryException.cs
- FixedSOMGroup.cs
- MatrixTransform3D.cs
- ToolStripDropDownItem.cs
- DataPagerField.cs
- LinqDataView.cs
- ImageField.cs
- HtmlEncodedRawTextWriter.cs
- validationstate.cs
- HtmlImage.cs
- TimeEnumHelper.cs
- CollaborationHelperFunctions.cs
- Int32.cs
- WebPartChrome.cs
- ArrangedElementCollection.cs
- ConstantProjectedSlot.cs
- DeploymentSectionCache.cs
- DbSourceParameterCollection.cs
- PathHelper.cs
- EmptyQuery.cs
- SchemaNotation.cs
- VariableQuery.cs
- XmlEncodedRawTextWriter.cs
- MemberAssignmentAnalysis.cs
- DataGridSortingEventArgs.cs
- RegularExpressionValidator.cs
- ItemPager.cs
- TextCompositionManager.cs
- TextFormatterImp.cs
- XpsFilter.cs
- ThousandthOfEmRealDoubles.cs
- StateChangeEvent.cs
- FusionWrap.cs
- HttpListenerRequestTraceRecord.cs
- XhtmlBasicLinkAdapter.cs
- GridViewRowPresenterBase.cs
- HttpGetProtocolImporter.cs
- XmlSchemaSimpleTypeUnion.cs
- Bidi.cs
- ToolZone.cs
- XmlWhitespace.cs
- path.cs
- CodeNamespaceImportCollection.cs
- CharacterBuffer.cs