Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / wpf / src / Framework / System / Windows / Documents / ChangeBlockUndoRecord.cs / 1 / ChangeBlockUndoRecord.cs
//---------------------------------------------------------------------------- // // File: ChangeBlockUndoRecord.cs // // Description: Undo wrapper for any edit on or through a TextRange or // TextContainer. // //--------------------------------------------------------------------------- using System; using System.Windows; using MS.Internal; using MS.Internal.Documents; namespace System.Windows.Documents { // Undo wrapper for any edit on or through a TextRange or TextContainer. internal class ChangeBlockUndoRecord { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors // Constructor, called when a change block is opening. internal ChangeBlockUndoRecord(ITextContainer textContainer, string actionDescription) { if (textContainer.UndoManager != null) { _undoManager = textContainer.UndoManager; if (_undoManager.IsEnabled) { // Don't bother opening an undo unit if the owning control is // still being initialized (ie, programmatic load by parser). if (textContainer.TextView != null) { // Don't bother opening a new undo unit if we're already nested // inside another. if (_undoManager.OpenedUnit == null) { if (textContainer.TextSelection != null) { _parentUndoUnit = new TextParentUndoUnit(textContainer.TextSelection); } else { _parentUndoUnit = new ParentUndoUnit(actionDescription); } _undoManager.Open(_parentUndoUnit); } } else { // If the owning control isn't initialized (parser is still running), // don't add anything to the undo record. Instead, clear it. _undoManager.Clear(); } } } } #endregion Constructors //------------------------------------------------------ // // Internal Methods // //----------------------------------------------------- #region Internal Methods // Called when a change block is closing. internal void OnEndChange() { // Commit our undo unit. if (_parentUndoUnit != null) { IParentUndoUnit openedUnit; if (_parentUndoUnit.Container is UndoManager) { openedUnit = ((UndoManager)_parentUndoUnit.Container).OpenedUnit; } else { openedUnit = ((IParentUndoUnit)_parentUndoUnit.Container).OpenedUnit; } // UIElementPropertyUndoUnit can clear the undo stack if a change is made to a databound property if (openedUnit == _parentUndoUnit) { if (_parentUndoUnit is TextParentUndoUnit) { ((TextParentUndoUnit)_parentUndoUnit).RecordRedoSelectionState(); } Invariant.Assert(_undoManager != null); _undoManager.Close(_parentUndoUnit, (_parentUndoUnit.LastUnit != null) ? UndoCloseAction.Commit : UndoCloseAction.Discard); } } } #endregion Internal Methods //------------------------------------------------------ // // Private Fields // //------------------------------------------------------ #region Private Fields private readonly UndoManager _undoManager; private readonly IParentUndoUnit _parentUndoUnit; #endregion Private Fields } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // File: ChangeBlockUndoRecord.cs // // Description: Undo wrapper for any edit on or through a TextRange or // TextContainer. // //--------------------------------------------------------------------------- using System; using System.Windows; using MS.Internal; using MS.Internal.Documents; namespace System.Windows.Documents { // Undo wrapper for any edit on or through a TextRange or TextContainer. internal class ChangeBlockUndoRecord { //----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors // Constructor, called when a change block is opening. internal ChangeBlockUndoRecord(ITextContainer textContainer, string actionDescription) { if (textContainer.UndoManager != null) { _undoManager = textContainer.UndoManager; if (_undoManager.IsEnabled) { // Don't bother opening an undo unit if the owning control is // still being initialized (ie, programmatic load by parser). if (textContainer.TextView != null) { // Don't bother opening a new undo unit if we're already nested // inside another. if (_undoManager.OpenedUnit == null) { if (textContainer.TextSelection != null) { _parentUndoUnit = new TextParentUndoUnit(textContainer.TextSelection); } else { _parentUndoUnit = new ParentUndoUnit(actionDescription); } _undoManager.Open(_parentUndoUnit); } } else { // If the owning control isn't initialized (parser is still running), // don't add anything to the undo record. Instead, clear it. _undoManager.Clear(); } } } } #endregion Constructors //------------------------------------------------------ // // Internal Methods // //----------------------------------------------------- #region Internal Methods // Called when a change block is closing. internal void OnEndChange() { // Commit our undo unit. if (_parentUndoUnit != null) { IParentUndoUnit openedUnit; if (_parentUndoUnit.Container is UndoManager) { openedUnit = ((UndoManager)_parentUndoUnit.Container).OpenedUnit; } else { openedUnit = ((IParentUndoUnit)_parentUndoUnit.Container).OpenedUnit; } // UIElementPropertyUndoUnit can clear the undo stack if a change is made to a databound property if (openedUnit == _parentUndoUnit) { if (_parentUndoUnit is TextParentUndoUnit) { ((TextParentUndoUnit)_parentUndoUnit).RecordRedoSelectionState(); } Invariant.Assert(_undoManager != null); _undoManager.Close(_parentUndoUnit, (_parentUndoUnit.LastUnit != null) ? UndoCloseAction.Commit : UndoCloseAction.Discard); } } } #endregion Internal Methods //------------------------------------------------------ // // Private Fields // //------------------------------------------------------ #region Private Fields private readonly UndoManager _undoManager; private readonly IParentUndoUnit _parentUndoUnit; #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
- AspProxy.cs
- XmlDataSourceNodeDescriptor.cs
- SmtpMail.cs
- DefaultValueConverter.cs
- DetailsViewModeEventArgs.cs
- DataGridView.cs
- SafeWaitHandle.cs
- SqlClientFactory.cs
- CounterSampleCalculator.cs
- URI.cs
- JsonReader.cs
- DataGridTableStyleMappingNameEditor.cs
- GroupDescription.cs
- Trace.cs
- InstanceCompleteException.cs
- DNS.cs
- RotateTransform.cs
- sitestring.cs
- FieldAccessException.cs
- RIPEMD160.cs
- RowsCopiedEventArgs.cs
- CodeArrayCreateExpression.cs
- CachedTypeface.cs
- BitmapEffect.cs
- SectionXmlInfo.cs
- mda.cs
- DesignerForm.cs
- DLinqDataModelProvider.cs
- followingsibling.cs
- ListViewItem.cs
- DataGridViewComboBoxCell.cs
- CompositeCollectionView.cs
- UniqueIdentifierService.cs
- RelationshipEntry.cs
- counter.cs
- WeakEventManager.cs
- DataGridItemCollection.cs
- ObjectAnimationBase.cs
- FrameworkReadOnlyPropertyMetadata.cs
- WindowsFormsDesignerOptionService.cs
- AgileSafeNativeMemoryHandle.cs
- ManagedIStream.cs
- Control.cs
- HtmlTextBoxAdapter.cs
- HttpCapabilitiesBase.cs
- UnsafeNativeMethodsMilCoreApi.cs
- Version.cs
- ResourceReferenceExpression.cs
- WebPartTracker.cs
- Transform3DCollection.cs
- OleDbInfoMessageEvent.cs
- TextRunCacheImp.cs
- CacheSection.cs
- EmptyReadOnlyDictionaryInternal.cs
- securitymgrsite.cs
- StreamFormatter.cs
- PageTheme.cs
- ExternalCalls.cs
- WeakHashtable.cs
- TextClipboardData.cs
- DataTableTypeConverter.cs
- XmlUrlResolver.cs
- XDRSchema.cs
- ReadOnlyAttribute.cs
- LinkButton.cs
- LayoutEvent.cs
- HTTPNotFoundHandler.cs
- OrderedEnumerableRowCollection.cs
- DataGridViewHeaderCell.cs
- DuplicateWaitObjectException.cs
- UpdateException.cs
- RequestBringIntoViewEventArgs.cs
- BindingElementExtensionElement.cs
- IgnoreFileBuildProvider.cs
- ConfigurationManagerHelperFactory.cs
- ObjectDataSourceChooseTypePanel.cs
- DataSourceHelper.cs
- BStrWrapper.cs
- DockPanel.cs
- AppSettingsExpressionEditor.cs
- ScrollItemProviderWrapper.cs
- MultidimensionalArrayItemReference.cs
- HttpProfileBase.cs
- AsynchronousChannel.cs
- WebPartConnectionsCloseVerb.cs
- SafeEventLogWriteHandle.cs
- DataServicePagingProviderWrapper.cs
- Symbol.cs
- AmbientProperties.cs
- ListView.cs
- PointAnimationClockResource.cs
- SerializationFieldInfo.cs
- AppDomainEvidenceFactory.cs
- TemplateBamlTreeBuilder.cs
- NullableDecimalSumAggregationOperator.cs
- DbProviderConfigurationHandler.cs
- ProbeMatches11.cs
- MemoryStream.cs
- HttpListenerResponse.cs
- PnrpPeerResolverBindingElement.cs