Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / System / Windows / TreeChangeInfo.cs / 1 / TreeChangeInfo.cs
//---------------------------------------------------------------------------- // // File: TreeChangeInfo.cs // // Description: // This data-structure is used // 1. As the data that is passed around by the DescendentsWalker // during an AncestorChanged tree-walk. // // Copyright (C) by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Windows.Media; using System.Windows.Controls; using System.Windows.Documents; using MS.Internal; using MS.Utility; namespace System.Windows { ////// This is the data that is passed through the DescendentsWalker /// during an AncestorChange tree-walk. /// internal struct TreeChangeInfo { #region Properties public TreeChangeInfo(DependencyObject root, DependencyObject parent, bool isAddOperation) { _rootOfChange = root; _isAddOperation = isAddOperation; _topmostCollapsedParentNode = null; _rootInheritableValues = null; _inheritablePropertiesStack = null; _valueIndexer = 0; // Create the InheritableProperties cache for the parent // and push it to start the stack ... we don't need to // pop this when we're done because we'll be throing the // stack away at that point. InheritablePropertiesStack.Push(CreateParentInheritableProperties(root, parent, isAddOperation)); } // // This method // 1. Is called from AncestorChange InvalidateTree. // 2. It is used to create the InheritableProperties on the given node. // 3. It also accumulates oldValues for the inheritable properties that are about to be invalidated // internal FrugalObjectListCreateParentInheritableProperties( DependencyObject d, DependencyObject parent, bool isAddOperation) { Debug.Assert(d != null, "Must have non-null current node"); if (parent == null) { return new FrugalObjectList (0); } DependencyObjectType treeObjDOT = d.DependencyObjectType; // See if we have a cached value. EffectiveValueEntry[] parentEffectiveValues = null; uint parentEffectiveValuesCount = 0; uint inheritablePropertiesCount = 0; // If inheritable properties aren't cached on you then use the effective // values cache on the parent to discover those inherited properties that // may need to be invalidated on the children nodes. if (!parent.IsSelfInheritanceParent) { DependencyObject inheritanceParent = parent.InheritanceParent; if (inheritanceParent != null) { parentEffectiveValues = inheritanceParent.EffectiveValues; parentEffectiveValuesCount = inheritanceParent.EffectiveValuesCount; inheritablePropertiesCount = inheritanceParent.InheritableEffectiveValuesCount; } } else { parentEffectiveValues = parent.EffectiveValues; parentEffectiveValuesCount = parent.EffectiveValuesCount; inheritablePropertiesCount = parent.InheritableEffectiveValuesCount; } FrugalObjectList inheritableProperties = new FrugalObjectList ((int) inheritablePropertiesCount); if (inheritablePropertiesCount == 0) { return inheritableProperties; } _rootInheritableValues = new InheritablePropertyChangeInfo[(int) inheritablePropertiesCount]; int inheritableIndex = 0; FrameworkObject foParent = new FrameworkObject(parent); for (uint i=0; i /// This is a stack that is used during an AncestorChange operation. /// I holds the InheritableProperties cache on the parent nodes in /// the tree in the order of traversal. The top of the stack holds /// the cache for the immediate parent node. /// internal Stack > InheritablePropertiesStack { get { if (_inheritablePropertiesStack == null) { _inheritablePropertiesStack = new Stack >(1); } return _inheritablePropertiesStack; } } /// /// When we enter a Visibility=Collapsed subtree, we remember that node /// using this property. As we process the children of this collapsed /// node, we see this property as non-null and know we're collapsed. /// As we exit the subtree, this reference is nulled out which means /// we don't know whether we're in a collapsed tree and the optimizations /// based on Visibility=Collapsed are not valid and should not be used. /// internal object TopmostCollapsedParentNode { get { return _topmostCollapsedParentNode; } set { _topmostCollapsedParentNode = value; } } // Indicates if this is a add child tree operation internal bool IsAddOperation { get { return _isAddOperation; } } // This is the element at the root of the sub-tree that had a parent change. internal DependencyObject Root { get { return _rootOfChange; } } #endregion Properties #region Data private Stack> _inheritablePropertiesStack; private object _topmostCollapsedParentNode; private bool _isAddOperation; private DependencyObject _rootOfChange; private InheritablePropertyChangeInfo[] _rootInheritableValues; private int _valueIndexer; #endregion Data } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // File: TreeChangeInfo.cs // // Description: // This data-structure is used // 1. As the data that is passed around by the DescendentsWalker // during an AncestorChanged tree-walk. // // Copyright (C) by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Windows.Media; using System.Windows.Controls; using System.Windows.Documents; using MS.Internal; using MS.Utility; namespace System.Windows { /// /// This is the data that is passed through the DescendentsWalker /// during an AncestorChange tree-walk. /// internal struct TreeChangeInfo { #region Properties public TreeChangeInfo(DependencyObject root, DependencyObject parent, bool isAddOperation) { _rootOfChange = root; _isAddOperation = isAddOperation; _topmostCollapsedParentNode = null; _rootInheritableValues = null; _inheritablePropertiesStack = null; _valueIndexer = 0; // Create the InheritableProperties cache for the parent // and push it to start the stack ... we don't need to // pop this when we're done because we'll be throing the // stack away at that point. InheritablePropertiesStack.Push(CreateParentInheritableProperties(root, parent, isAddOperation)); } // // This method // 1. Is called from AncestorChange InvalidateTree. // 2. It is used to create the InheritableProperties on the given node. // 3. It also accumulates oldValues for the inheritable properties that are about to be invalidated // internal FrugalObjectListCreateParentInheritableProperties( DependencyObject d, DependencyObject parent, bool isAddOperation) { Debug.Assert(d != null, "Must have non-null current node"); if (parent == null) { return new FrugalObjectList (0); } DependencyObjectType treeObjDOT = d.DependencyObjectType; // See if we have a cached value. EffectiveValueEntry[] parentEffectiveValues = null; uint parentEffectiveValuesCount = 0; uint inheritablePropertiesCount = 0; // If inheritable properties aren't cached on you then use the effective // values cache on the parent to discover those inherited properties that // may need to be invalidated on the children nodes. if (!parent.IsSelfInheritanceParent) { DependencyObject inheritanceParent = parent.InheritanceParent; if (inheritanceParent != null) { parentEffectiveValues = inheritanceParent.EffectiveValues; parentEffectiveValuesCount = inheritanceParent.EffectiveValuesCount; inheritablePropertiesCount = inheritanceParent.InheritableEffectiveValuesCount; } } else { parentEffectiveValues = parent.EffectiveValues; parentEffectiveValuesCount = parent.EffectiveValuesCount; inheritablePropertiesCount = parent.InheritableEffectiveValuesCount; } FrugalObjectList inheritableProperties = new FrugalObjectList ((int) inheritablePropertiesCount); if (inheritablePropertiesCount == 0) { return inheritableProperties; } _rootInheritableValues = new InheritablePropertyChangeInfo[(int) inheritablePropertiesCount]; int inheritableIndex = 0; FrameworkObject foParent = new FrameworkObject(parent); for (uint i=0; i /// This is a stack that is used during an AncestorChange operation. /// I holds the InheritableProperties cache on the parent nodes in /// the tree in the order of traversal. The top of the stack holds /// the cache for the immediate parent node. /// internal Stack > InheritablePropertiesStack { get { if (_inheritablePropertiesStack == null) { _inheritablePropertiesStack = new Stack >(1); } return _inheritablePropertiesStack; } } /// /// When we enter a Visibility=Collapsed subtree, we remember that node /// using this property. As we process the children of this collapsed /// node, we see this property as non-null and know we're collapsed. /// As we exit the subtree, this reference is nulled out which means /// we don't know whether we're in a collapsed tree and the optimizations /// based on Visibility=Collapsed are not valid and should not be used. /// internal object TopmostCollapsedParentNode { get { return _topmostCollapsedParentNode; } set { _topmostCollapsedParentNode = value; } } // Indicates if this is a add child tree operation internal bool IsAddOperation { get { return _isAddOperation; } } // This is the element at the root of the sub-tree that had a parent change. internal DependencyObject Root { get { return _rootOfChange; } } #endregion Properties #region Data private Stack> _inheritablePropertiesStack; private object _topmostCollapsedParentNode; private bool _isAddOperation; private DependencyObject _rootOfChange; private InheritablePropertyChangeInfo[] _rootInheritableValues; private int _valueIndexer; #endregion Data } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- PersistencePipeline.cs
- Optimizer.cs
- HttpApplication.cs
- DBDataPermission.cs
- StateDesigner.CommentLayoutGlyph.cs
- CodeDirectionExpression.cs
- SettingsPropertyCollection.cs
- NameValueSectionHandler.cs
- ManagedFilter.cs
- SyndicationElementExtensionCollection.cs
- SuppressMergeCheckAttribute.cs
- Image.cs
- LinqDataSourceValidationException.cs
- UrlPath.cs
- IDQuery.cs
- Section.cs
- EventLogPermissionEntryCollection.cs
- ArglessEventHandlerProxy.cs
- StylusSystemGestureEventArgs.cs
- EpmSourcePathSegment.cs
- LoginName.cs
- ByteStreamMessageEncoder.cs
- NativeMethods.cs
- DesignBindingEditor.cs
- PrimaryKeyTypeConverter.cs
- xdrvalidator.cs
- StylusEventArgs.cs
- PropertiesTab.cs
- ServiceModelPerformanceCounters.cs
- Matrix3DValueSerializer.cs
- ValueQuery.cs
- Function.cs
- Message.cs
- IconHelper.cs
- MergePropertyDescriptor.cs
- PrinterUnitConvert.cs
- ToolStripDropDownItem.cs
- TextSelection.cs
- PermissionSetEnumerator.cs
- DataBoundControlHelper.cs
- XamlRtfConverter.cs
- DBCommandBuilder.cs
- SaveFileDialog.cs
- NonVisualControlAttribute.cs
- IconHelper.cs
- WorkflowTerminatedException.cs
- TemplateGroupCollection.cs
- PassportAuthentication.cs
- EnumValAlphaComparer.cs
- SQLInt32.cs
- TabPage.cs
- UntrustedRecipientException.cs
- FileClassifier.cs
- MobileCategoryAttribute.cs
- EdmRelationshipRoleAttribute.cs
- BuildResult.cs
- RTTypeWrapper.cs
- SecurityRuntime.cs
- WizardStepBase.cs
- TabOrder.cs
- CalendarDesigner.cs
- DesigntimeLicenseContextSerializer.cs
- SoapConverter.cs
- BuildProvider.cs
- WindowsStartMenu.cs
- BoundField.cs
- DockingAttribute.cs
- Int32Rect.cs
- MenuItem.cs
- MaskDescriptor.cs
- UnauthorizedAccessException.cs
- URLEditor.cs
- ObjectPropertyMapping.cs
- WrappedOptions.cs
- ActionFrame.cs
- MSAAEventDispatcher.cs
- ExceptionRoutedEventArgs.cs
- SmiTypedGetterSetter.cs
- TypeConstant.cs
- RangeValidator.cs
- SynchronizedChannelCollection.cs
- ExpressionBuilder.cs
- ToolStripLabel.cs
- SymLanguageType.cs
- SqlException.cs
- ScrollEvent.cs
- DataReaderContainer.cs
- UrlMappingCollection.cs
- ListViewHitTestInfo.cs
- NameValueFileSectionHandler.cs
- X509RecipientCertificateClientElement.cs
- activationcontext.cs
- NullableBoolConverter.cs
- XmlDataSourceView.cs
- IItemContainerGenerator.cs
- WinInetCache.cs
- ConnectionStringSettings.cs
- XmlDataImplementation.cs
- ObservableDictionary.cs
- CannotUnloadAppDomainException.cs