Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Documents / TextTreeObjectNode.cs / 1305600 / TextTreeObjectNode.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: A TextContainer node representing a UIElement. // // History: // 02/18/2004 : [....] - Created // //--------------------------------------------------------------------------- using System; using MS.Internal; namespace System.Windows.Documents { // UIElements in the TextContainer are represented internally by TextTreeObjectNodes. // // This class is a simple container for a UIElement, it only holds state. internal class TextTreeObjectNode : TextTreeNode { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors // Creates a new TextTreeObjectNode instance. internal TextTreeObjectNode(DependencyObject embeddedElement) { _embeddedElement = embeddedElement; _symbolOffsetCache = -1; } #endregion Constructors //------------------------------------------------------ // // Public Methods // //----------------------------------------------------- #region Public Methods #if DEBUG // Debug-only ToString override. public override string ToString() { return ("ObjectNode Id=" + this.DebugId + " Object=" + _embeddedElement); } #endif // DEBUG #endregion Public Methods //------------------------------------------------------ // // Internal Methods // //------------------------------------------------------ #region Internal Methods // Returns a shallow copy of this node. internal override TextTreeNode Clone() { TextTreeObjectNode clone; clone = new TextTreeObjectNode(_embeddedElement); return clone; } // Returns the TextPointerContext of the node. internal override TextPointerContext GetPointerContext(LogicalDirection direction) { return TextPointerContext.EmbeddedElement; } #endregion Internal methods //----------------------------------------------------- // // Internal Properties // //------------------------------------------------------ #region Internal Properties // If this node is a local root, then ParentNode contains it. // Otherwise, this is the node parenting this node within its tree. internal override SplayTreeNode ParentNode { get { return _parentNode; } set { _parentNode = (TextTreeNode)value; } } // TextTreeObjectNode never has contained nodes. internal override SplayTreeNode ContainedNode { get { return null; } set { Invariant.Assert(false, "Can't set contained node on a TextTreeObjectNode!"); } } // Count of symbols of all siblings preceding this node. internal override int LeftSymbolCount { get { return _leftSymbolCount; } set { _leftSymbolCount = value; } } // Count of symbols of all siblings preceding this node. internal override int LeftCharCount { get { return _leftCharCount; } set { _leftCharCount = value; } } // Left child node in a sibling tree. internal override SplayTreeNode LeftChildNode { get { return _leftChildNode; } set { _leftChildNode = (TextTreeNode)value; } } // Right child node in a sibling tree. internal override SplayTreeNode RightChildNode { get { return _rightChildNode; } set { _rightChildNode = (TextTreeNode)value; } } // The TextContainer's generation when SymbolOffsetCache was last updated. // If the current generation doesn't match TextContainer.Generation, then // SymbolOffsetCache is invalid. internal override uint Generation { get { return _generation; } set { _generation = value; } } // Cached symbol offset. internal override int SymbolOffsetCache { get { return _symbolOffsetCache; } set { _symbolOffsetCache = value; } } // Count of symbols covered by this node. internal override int SymbolCount { get { return 1; } set { Invariant.Assert(false, "Can't set SymbolCount on TextTreeObjectNode!"); } } // Count of symbols covered by this node. internal override int IMECharCount { get { return 1; } set { Invariant.Assert(false, "Can't set CharCount on TextTreeObjectNode!"); } } // Count of TextPositions referencing the node's BeforeStart edge. // Since nodes don't usually have any references, we demand allocate // storage when needed. internal override bool BeforeStartReferenceCount { get { return (_edgeReferenceCounts & ElementEdge.BeforeStart) != 0; } set { Invariant.Assert(value); // Illegal to clear a set ref count. _edgeReferenceCounts |= ElementEdge.BeforeStart; } } // Count of TextPositions referencing the node's AfterStart edge. // Since object nodes don't have an AfterStart edge, this is always zero. internal override bool AfterStartReferenceCount { get { return false; } set { Invariant.Assert(false, "Object nodes don't have an AfterStart edge!"); } } // Count of TextPositions referencing the node's BeforeEnd edge. // Since object nodes don't have an BeforeEnd edge, this is always zero. internal override bool BeforeEndReferenceCount { get { return false; } set { Invariant.Assert(false, "Object nodes don't have a BeforeEnd edge!"); } } // Count of TextPositions referencing the node's right // edge. // Since nodes don't usually have any references, we demand allocate // storage when needed. internal override bool AfterEndReferenceCount { get { return (_edgeReferenceCounts & ElementEdge.AfterEnd) != 0; } set { Invariant.Assert(value); // Illegal to clear a set ref count. _edgeReferenceCounts |= ElementEdge.AfterEnd; } } // The UIElement or ContentElement linked to this node. internal DependencyObject EmbeddedElement { get { return _embeddedElement; } } #endregion Internal Properties //----------------------------------------------------- // // Private Fields // //----------------------------------------------------- #region Private Fields // Count of symbols of all siblings preceding this node. private int _leftSymbolCount; // Count of chars of all siblings preceding this node. private int _leftCharCount; // If this node is a local root, then ParentNode contains it. // Otherwise, this is the node parenting this node within its tree. private TextTreeNode _parentNode; // Left child node in a sibling tree. private TextTreeNode _leftChildNode; // Right child node in a sibling tree. private TextTreeNode _rightChildNode; // The TextContainer's generation when SymbolOffsetCache was last updated. // If the current generation doesn't match TextContainer.Generation, then // SymbolOffsetCache is invalid. private uint _generation; // Cached symbol offset. private int _symbolOffsetCache; // Reference counts of TextPositions referencing this node. // Lazy allocated -- null means no references. private ElementEdge _edgeReferenceCounts; // The UIElement or ContentElement linked to this node. private readonly DependencyObject _embeddedElement; #endregion Private Fields } } // 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
- DetailsViewRow.cs
- TextEditorSpelling.cs
- PerformanceCounterCategory.cs
- ValueOfAction.cs
- CodeTypeDelegate.cs
- CookieProtection.cs
- NameValueFileSectionHandler.cs
- HwndStylusInputProvider.cs
- Int32CollectionValueSerializer.cs
- PnrpPermission.cs
- ScriptServiceAttribute.cs
- StreamingContext.cs
- MemberDescriptor.cs
- ChangePasswordDesigner.cs
- SelectionWordBreaker.cs
- DataServices.cs
- DataGridCommandEventArgs.cs
- SqlCaseSimplifier.cs
- OleDbRowUpdatingEvent.cs
- InfoCardRSAOAEPKeyExchangeFormatter.cs
- VarRemapper.cs
- PeerName.cs
- MessageBox.cs
- DoWorkEventArgs.cs
- EventLogPropertySelector.cs
- ButtonField.cs
- XmlArrayAttribute.cs
- PageCopyCount.cs
- ColorMap.cs
- NetNamedPipeSecurity.cs
- TextReader.cs
- TypeContext.cs
- PersonalizationStateInfoCollection.cs
- WebPartCloseVerb.cs
- metadatamappinghashervisitor.hashsourcebuilder.cs
- TaskDesigner.cs
- XmlTextReaderImplHelpers.cs
- SynchronizedRandom.cs
- Selection.cs
- PropertyGrid.cs
- RelationshipNavigation.cs
- NewItemsContextMenuStrip.cs
- ProtocolsSection.cs
- ElapsedEventArgs.cs
- MachineKeyValidationConverter.cs
- WebPartZone.cs
- DrawingContext.cs
- InvalidAsynchronousStateException.cs
- StateMachineSubscription.cs
- KeyedQueue.cs
- MultiSelectRootGridEntry.cs
- ServiceModelConfigurationElementCollection.cs
- TransactedReceiveData.cs
- StrongNameSignatureInformation.cs
- AddInToken.cs
- IPGlobalProperties.cs
- rsa.cs
- FreezableDefaultValueFactory.cs
- GeometryHitTestParameters.cs
- PagesSection.cs
- RichTextBoxConstants.cs
- ToolStripHighContrastRenderer.cs
- VSWCFServiceContractGenerator.cs
- IIS7WorkerRequest.cs
- FormsAuthenticationConfiguration.cs
- ReadOnlyDictionary.cs
- ValidatingReaderNodeData.cs
- AnnotationResourceChangedEventArgs.cs
- mediaeventargs.cs
- EntityUtil.cs
- DataGridCommandEventArgs.cs
- EditorZoneBase.cs
- Logging.cs
- MetadataPropertyCollection.cs
- DataGridCellsPanel.cs
- GridLength.cs
- ConnectionManagementElement.cs
- AuthenticationModulesSection.cs
- BaseDataList.cs
- ListDictionaryInternal.cs
- DropDownButton.cs
- StylusDownEventArgs.cs
- ControlBuilderAttribute.cs
- GeneratedView.cs
- _DigestClient.cs
- ColumnPropertiesGroup.cs
- Script.cs
- InkCanvasSelectionAdorner.cs
- TextHidden.cs
- EffectiveValueEntry.cs
- TableLayoutStyle.cs
- DesignerProperties.cs
- VariableAction.cs
- XmlAnyAttributeAttribute.cs
- RowUpdatingEventArgs.cs
- ModulesEntry.cs
- DecimalAnimationBase.cs
- Window.cs
- UpdateProgress.cs
- EventEntry.cs