Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / wpf / src / Framework / System / Windows / Documents / TextTreeUndo.cs / 1 / TextTreeUndo.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Helper class for TextContainer, handles all undo operations. // // History: // 03/03/2004 : benwest - Created // //--------------------------------------------------------------------------- using MS.Internal.Documents; namespace System.Windows.Documents { // This static class is logically an extension of TextContainer. It contains // TextContainer undo related helpers. internal static class TextTreeUndo { //----------------------------------------------------- // // Internal Methods // //----------------------------------------------------- #region Internal Methods // Adds a TextTreeInsertUndoUnit to the open parent undo unit, if any. // Called from TextContainer.InsertText and TextContainer.InsertEmbeddedObject. internal static void CreateInsertUndoUnit(TextContainer tree, int symbolOffset, int symbolCount) { UndoManager undoManager; undoManager = GetOrClearUndoManager(tree); if (undoManager == null) return; undoManager.Add(new TextTreeInsertUndoUnit(tree, symbolOffset, symbolCount)); } // Adds a TextTreeInsertElementUndoUnit to the open parent undo unit, if any. // Called from TextContainer.InsertElement. internal static void CreateInsertElementUndoUnit(TextContainer tree, int symbolOffset, bool deep) { UndoManager undoManager; undoManager = GetOrClearUndoManager(tree); if (undoManager == null) return; undoManager.Add(new TextTreeInsertElementUndoUnit(tree, symbolOffset, deep)); } // Adds a TextTreePropertyUndoUnit to the open parent undo unit, if any. // Called by TextElement's property change listener. internal static void CreatePropertyUndoUnit(TextElement element, DependencyPropertyChangedEventArgs e) { UndoManager undoManager; PropertyRecord record; TextContainer textContainer = element.TextContainer; undoManager = GetOrClearUndoManager(textContainer); if (undoManager == null) return; record = new PropertyRecord(); record.Property = e.Property; record.Value = e.OldValueSource == BaseValueSourceInternal.Local ? e.OldValue : DependencyProperty.UnsetValue; undoManager.Add(new TextTreePropertyUndoUnit(textContainer, element.TextElementNode.GetSymbolOffset(textContainer.Generation) + 1, record)); } // Adds a DeleteContentUndoUnit to the open parent undo unit, if any. // Called by TextContainer.DeleteContent. internal static TextTreeDeleteContentUndoUnit CreateDeleteContentUndoUnit(TextContainer tree, TextPointer start, TextPointer end) { UndoManager undoManager; TextTreeDeleteContentUndoUnit undoUnit; if (start.CompareTo(end) == 0) return null; undoManager = GetOrClearUndoManager(tree); if (undoManager == null) return null; undoUnit = new TextTreeDeleteContentUndoUnit(tree, start, end); undoManager.Add(undoUnit); return undoUnit; } // Adds a TextTreeExtractElementUndoUnit to the open parent undo unit, if any. // Called by TextContainer.ExtractElement. internal static TextTreeExtractElementUndoUnit CreateExtractElementUndoUnit(TextContainer tree, TextTreeTextElementNode elementNode) { UndoManager undoManager; TextTreeExtractElementUndoUnit undoUnit; undoManager = GetOrClearUndoManager(tree); if (undoManager == null) return null; undoUnit = new TextTreeExtractElementUndoUnit(tree, elementNode); undoManager.Add(undoUnit); return undoUnit; } // Returns the local UndoManager. // Returns null if there is no undo service or if the service exists // but is disabled or if there is no open parent undo unit. internal static UndoManager GetOrClearUndoManager(ITextContainer textContainer) { UndoManager undoManager; undoManager = textContainer.UndoManager; if (undoManager == null) return null; if (!undoManager.IsEnabled) return null; if (undoManager.OpenedUnit == null) { // There's no parent undo unit, so we can't open a child. // // Clear the undo stack -- since we depend on symbol offsets // matching the original document state when an undo unit is // executed, any of our units currently in the stack will be // corrupted after we finished the operation in progress. undoManager.Clear(); return null; } return undoManager; } #endregion Internal methods } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Helper class for TextContainer, handles all undo operations. // // History: // 03/03/2004 : benwest - Created // //--------------------------------------------------------------------------- using MS.Internal.Documents; namespace System.Windows.Documents { // This static class is logically an extension of TextContainer. It contains // TextContainer undo related helpers. internal static class TextTreeUndo { //----------------------------------------------------- // // Internal Methods // //----------------------------------------------------- #region Internal Methods // Adds a TextTreeInsertUndoUnit to the open parent undo unit, if any. // Called from TextContainer.InsertText and TextContainer.InsertEmbeddedObject. internal static void CreateInsertUndoUnit(TextContainer tree, int symbolOffset, int symbolCount) { UndoManager undoManager; undoManager = GetOrClearUndoManager(tree); if (undoManager == null) return; undoManager.Add(new TextTreeInsertUndoUnit(tree, symbolOffset, symbolCount)); } // Adds a TextTreeInsertElementUndoUnit to the open parent undo unit, if any. // Called from TextContainer.InsertElement. internal static void CreateInsertElementUndoUnit(TextContainer tree, int symbolOffset, bool deep) { UndoManager undoManager; undoManager = GetOrClearUndoManager(tree); if (undoManager == null) return; undoManager.Add(new TextTreeInsertElementUndoUnit(tree, symbolOffset, deep)); } // Adds a TextTreePropertyUndoUnit to the open parent undo unit, if any. // Called by TextElement's property change listener. internal static void CreatePropertyUndoUnit(TextElement element, DependencyPropertyChangedEventArgs e) { UndoManager undoManager; PropertyRecord record; TextContainer textContainer = element.TextContainer; undoManager = GetOrClearUndoManager(textContainer); if (undoManager == null) return; record = new PropertyRecord(); record.Property = e.Property; record.Value = e.OldValueSource == BaseValueSourceInternal.Local ? e.OldValue : DependencyProperty.UnsetValue; undoManager.Add(new TextTreePropertyUndoUnit(textContainer, element.TextElementNode.GetSymbolOffset(textContainer.Generation) + 1, record)); } // Adds a DeleteContentUndoUnit to the open parent undo unit, if any. // Called by TextContainer.DeleteContent. internal static TextTreeDeleteContentUndoUnit CreateDeleteContentUndoUnit(TextContainer tree, TextPointer start, TextPointer end) { UndoManager undoManager; TextTreeDeleteContentUndoUnit undoUnit; if (start.CompareTo(end) == 0) return null; undoManager = GetOrClearUndoManager(tree); if (undoManager == null) return null; undoUnit = new TextTreeDeleteContentUndoUnit(tree, start, end); undoManager.Add(undoUnit); return undoUnit; } // Adds a TextTreeExtractElementUndoUnit to the open parent undo unit, if any. // Called by TextContainer.ExtractElement. internal static TextTreeExtractElementUndoUnit CreateExtractElementUndoUnit(TextContainer tree, TextTreeTextElementNode elementNode) { UndoManager undoManager; TextTreeExtractElementUndoUnit undoUnit; undoManager = GetOrClearUndoManager(tree); if (undoManager == null) return null; undoUnit = new TextTreeExtractElementUndoUnit(tree, elementNode); undoManager.Add(undoUnit); return undoUnit; } // Returns the local UndoManager. // Returns null if there is no undo service or if the service exists // but is disabled or if there is no open parent undo unit. internal static UndoManager GetOrClearUndoManager(ITextContainer textContainer) { UndoManager undoManager; undoManager = textContainer.UndoManager; if (undoManager == null) return null; if (!undoManager.IsEnabled) return null; if (undoManager.OpenedUnit == null) { // There's no parent undo unit, so we can't open a child. // // Clear the undo stack -- since we depend on symbol offsets // matching the original document state when an undo unit is // executed, any of our units currently in the stack will be // corrupted after we finished the operation in progress. undoManager.Clear(); return null; } return undoManager; } #endregion Internal methods } } // 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
- IdentityValidationException.cs
- SerTrace.cs
- XmlBinaryReader.cs
- ValueTypeFixupInfo.cs
- TreeViewImageIndexConverter.cs
- Attribute.cs
- StructuralCache.cs
- ForceCopyBuildProvider.cs
- InfiniteTimeSpanConverter.cs
- SchemaElementLookUpTable.cs
- SystemResourceKey.cs
- RightsManagementInformation.cs
- QueryStringParameter.cs
- OutputCacheProfile.cs
- ObjectViewFactory.cs
- ToolStripButton.cs
- DockPanel.cs
- CodeDomSerializerBase.cs
- SafeViewOfFileHandle.cs
- ToolStripHighContrastRenderer.cs
- ConditionalWeakTable.cs
- DataGridCaption.cs
- TreeNodeMouseHoverEvent.cs
- XmlLinkedNode.cs
- ISAPIWorkerRequest.cs
- DataGridViewRowErrorTextNeededEventArgs.cs
- MissingManifestResourceException.cs
- TraceHandlerErrorFormatter.cs
- FixedSOMPageConstructor.cs
- Int16.cs
- HostingEnvironment.cs
- ActivationArguments.cs
- GeneralTransform3D.cs
- DataViewListener.cs
- ExceptionUtil.cs
- Propagator.cs
- MruCache.cs
- ActivityTypeDesigner.xaml.cs
- ConfigurationSectionGroupCollection.cs
- IdentityNotMappedException.cs
- ActiveDocumentEvent.cs
- ServiceBuildProvider.cs
- XmlSchemaExporter.cs
- TracePayload.cs
- ExpressionEditor.cs
- RepeaterDataBoundAdapter.cs
- Formatter.cs
- LogAppendAsyncResult.cs
- XmlIgnoreAttribute.cs
- SrgsDocument.cs
- WSTrustDec2005.cs
- TemplatedWizardStep.cs
- XmlDocumentType.cs
- EmptyStringExpandableObjectConverter.cs
- AmbientLight.cs
- PropertyEmitter.cs
- _ListenerRequestStream.cs
- DataGridViewColumnTypePicker.cs
- PeerApplication.cs
- DataRowIndexBuffer.cs
- OLEDB_Util.cs
- MediaTimeline.cs
- IsolatedStorageFileStream.cs
- GetWinFXPath.cs
- MessageUtil.cs
- DES.cs
- XmlEntityReference.cs
- ParserHooks.cs
- TemplateControlBuildProvider.cs
- ExternalCalls.cs
- WindowsGraphics2.cs
- StringArrayConverter.cs
- WindowPatternIdentifiers.cs
- SelectionListComponentEditor.cs
- BamlRecords.cs
- RuleAttributes.cs
- ArraySet.cs
- StorageAssociationTypeMapping.cs
- QueryBranchOp.cs
- ImageIndexConverter.cs
- ValuePattern.cs
- SqlDataSourceView.cs
- AutoResetEvent.cs
- PriorityBinding.cs
- InfocardInteractiveChannelInitializer.cs
- HtmlInputImage.cs
- EntityDataSourceContextCreatedEventArgs.cs
- FlowchartDesignerCommands.cs
- NativeMethods.cs
- InternalMappingException.cs
- AdornerPresentationContext.cs
- SafeEventLogWriteHandle.cs
- NodeCounter.cs
- CodeCatchClauseCollection.cs
- ToolStripArrowRenderEventArgs.cs
- SecurityTokenResolver.cs
- ConfigurationConverterBase.cs
- cookieexception.cs
- WorkflowRuntimeServicesBehavior.cs
- COM2Properties.cs