Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / System / Windows / Documents / TextParentUndoUnit.cs / 1 / TextParentUndoUnit.cs
//---------------------------------------------------------------------------- //--------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // Description: // // See spec at http://avalon/uis/Stock%20Services/Undo%20spec.htm // // History: // 03/23/2004 : eveselov - created // //--------------------------------------------------------------------------- using System; using MS.Internal; using System.Windows.Input; using System.Windows.Controls; using System.Windows.Documents.Internal; using System.Windows.Threading; using System.ComponentModel; using System.Windows.Media; using System.Windows.Markup; using System.Text; using MS.Utility; using MS.Internal.Documents; namespace System.Windows.Documents { ////// TextParentUndoUnit /// internal class TextParentUndoUnit : ParentUndoUnit { //----------------------------------------------------- // // Constructors // //------------------------------------------------------ #region Constructors ////// Constructor /// /// /// TextSelection before executing the operation. /// internal TextParentUndoUnit(ITextSelection selection) : this(selection, selection.AnchorPosition, selection.MovingPosition) { } internal TextParentUndoUnit(ITextSelection selection, ITextPointer anchorPosition, ITextPointer movingPosition) : base(String.Empty) { _selection = selection; _undoAnchorPositionOffset = anchorPosition.Offset; _undoAnchorPositionDirection = anchorPosition.LogicalDirection; _undoMovingPositionOffset = movingPosition.Offset; _undoMovingPositionDirection = movingPosition.LogicalDirection; // Bug 1706768: we are seeing unitialized values when the undo // undo is pulled off the undo stack. _redoAnchorPositionOffset // and _redoMovingPositionOffset are supposed to be initialized // with calls to RecordRedoSelectionState before that happens. // // This code path is being left enabled in DEBUG to help track down // the underlying bug post V1. #if DEBUG _redoAnchorPositionOffset = -1; _redoMovingPositionOffset = -1; #else _redoAnchorPositionOffset = 0; _redoMovingPositionOffset = 0; #endif } ////// Creates a redo unit from an undo unit. /// protected TextParentUndoUnit(TextParentUndoUnit undoUnit) : base(String.Empty) { _selection = undoUnit._selection; _undoAnchorPositionOffset = undoUnit._redoAnchorPositionOffset; _undoAnchorPositionDirection = undoUnit._redoAnchorPositionDirection; _undoMovingPositionOffset = undoUnit._redoMovingPositionOffset; _undoMovingPositionDirection = undoUnit._redoMovingPositionDirection; // Bug 1706768: we are seeing unitialized values when the undo // undo is pulled off the undo stack. _redoAnchorPositionOffset // and _redoMovingPositionOffset are supposed to be initialized // with calls to RecordRedoSelectionState before that happens. // // This code path is being left enabled in DEBUG to help track down // the underlying bug post V1. #if DEBUG _redoAnchorPositionOffset = -1; _redoMovingPositionOffset = -1; #else _redoAnchorPositionOffset = 0; _redoMovingPositionOffset = 0; #endif } #endregion Constructors //----------------------------------------------------- // // Public Methods // //------------------------------------------------------ #region Public Methods ////// Implements IUndoUnit::Do(). For IParentUndoUnit, this means iterating through /// all contained units and calling their Do(). /// public override void Do() { base.Do(); // Note: TextParentUndoUnit will be created here by our callback CreateParentUndoUnitForSelf. ITextContainer textContainer = _selection.Start.TextContainer; ITextPointer anchorPosition = textContainer.CreatePointerAtOffset(_undoAnchorPositionOffset, _undoAnchorPositionDirection); ITextPointer movingPosition = textContainer.CreatePointerAtOffset(_undoMovingPositionOffset, _undoMovingPositionDirection); _selection.Select(anchorPosition, movingPosition); _redoUnit.RecordRedoSelectionState(); } #endregion Public Methods //------------------------------------------------------ // // Protected Methods // //----------------------------------------------------- #region Protected Methods ////// Implements a callback called from base.Do method for /// creating appropriate ParentUndoUnit for redo. /// ///protected override IParentUndoUnit CreateParentUndoUnitForSelf() { _redoUnit = CreateRedoUnit(); return _redoUnit; } protected virtual TextParentUndoUnit CreateRedoUnit() { return new TextParentUndoUnit(this); } protected void MergeRedoSelectionState(TextParentUndoUnit undoUnit) { _redoAnchorPositionOffset = undoUnit._redoAnchorPositionOffset; _redoAnchorPositionDirection = undoUnit._redoAnchorPositionDirection; _redoMovingPositionOffset = undoUnit._redoMovingPositionOffset; _redoMovingPositionDirection = undoUnit._redoMovingPositionDirection; } #endregion Protected Methods //------------------------------------------------------ // // Internal Methods // //----------------------------------------------------- #region Internal Methods /// /// This method should be called just before the undo unit is closed. It will capture /// the current selectionStart and selectionEnd offsets for use later when this undo unit /// gets Redone. /// internal void RecordRedoSelectionState() { RecordRedoSelectionState(_selection.AnchorPosition, _selection.MovingPosition); } ////// This method should be called just before the undo unit is closed. It will capture /// the current selectionStart and selectionEnd offsets for use later when this undo unit /// gets Redone. /// internal void RecordRedoSelectionState(ITextPointer anchorPosition, ITextPointer movingPosition) { _redoAnchorPositionOffset = anchorPosition.Offset; _redoAnchorPositionDirection = anchorPosition.LogicalDirection; _redoMovingPositionOffset = movingPosition.Offset; _redoMovingPositionDirection = movingPosition.LogicalDirection; } #endregion Internal Methods //----------------------------------------------------- // // Private Fields // //----------------------------------------------------- #region Private Fields private readonly ITextSelection _selection; private readonly int _undoAnchorPositionOffset; private readonly LogicalDirection _undoAnchorPositionDirection; private readonly int _undoMovingPositionOffset; private readonly LogicalDirection _undoMovingPositionDirection; private int _redoAnchorPositionOffset; private LogicalDirection _redoAnchorPositionDirection; private int _redoMovingPositionOffset; private LogicalDirection _redoMovingPositionDirection; private TextParentUndoUnit _redoUnit; #if DEBUG // Debug-only unique identifier for this instance. private readonly int _debugId = _debugIdCounter++; // Debug-only id counter. private static int _debugIdCounter; #endif #endregion Private Fields } } // 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: // // See spec at http://avalon/uis/Stock%20Services/Undo%20spec.htm // // History: // 03/23/2004 : eveselov - created // //--------------------------------------------------------------------------- using System; using MS.Internal; using System.Windows.Input; using System.Windows.Controls; using System.Windows.Documents.Internal; using System.Windows.Threading; using System.ComponentModel; using System.Windows.Media; using System.Windows.Markup; using System.Text; using MS.Utility; using MS.Internal.Documents; namespace System.Windows.Documents { ////// TextParentUndoUnit /// internal class TextParentUndoUnit : ParentUndoUnit { //----------------------------------------------------- // // Constructors // //------------------------------------------------------ #region Constructors ////// Constructor /// /// /// TextSelection before executing the operation. /// internal TextParentUndoUnit(ITextSelection selection) : this(selection, selection.AnchorPosition, selection.MovingPosition) { } internal TextParentUndoUnit(ITextSelection selection, ITextPointer anchorPosition, ITextPointer movingPosition) : base(String.Empty) { _selection = selection; _undoAnchorPositionOffset = anchorPosition.Offset; _undoAnchorPositionDirection = anchorPosition.LogicalDirection; _undoMovingPositionOffset = movingPosition.Offset; _undoMovingPositionDirection = movingPosition.LogicalDirection; // Bug 1706768: we are seeing unitialized values when the undo // undo is pulled off the undo stack. _redoAnchorPositionOffset // and _redoMovingPositionOffset are supposed to be initialized // with calls to RecordRedoSelectionState before that happens. // // This code path is being left enabled in DEBUG to help track down // the underlying bug post V1. #if DEBUG _redoAnchorPositionOffset = -1; _redoMovingPositionOffset = -1; #else _redoAnchorPositionOffset = 0; _redoMovingPositionOffset = 0; #endif } ////// Creates a redo unit from an undo unit. /// protected TextParentUndoUnit(TextParentUndoUnit undoUnit) : base(String.Empty) { _selection = undoUnit._selection; _undoAnchorPositionOffset = undoUnit._redoAnchorPositionOffset; _undoAnchorPositionDirection = undoUnit._redoAnchorPositionDirection; _undoMovingPositionOffset = undoUnit._redoMovingPositionOffset; _undoMovingPositionDirection = undoUnit._redoMovingPositionDirection; // Bug 1706768: we are seeing unitialized values when the undo // undo is pulled off the undo stack. _redoAnchorPositionOffset // and _redoMovingPositionOffset are supposed to be initialized // with calls to RecordRedoSelectionState before that happens. // // This code path is being left enabled in DEBUG to help track down // the underlying bug post V1. #if DEBUG _redoAnchorPositionOffset = -1; _redoMovingPositionOffset = -1; #else _redoAnchorPositionOffset = 0; _redoMovingPositionOffset = 0; #endif } #endregion Constructors //----------------------------------------------------- // // Public Methods // //------------------------------------------------------ #region Public Methods ////// Implements IUndoUnit::Do(). For IParentUndoUnit, this means iterating through /// all contained units and calling their Do(). /// public override void Do() { base.Do(); // Note: TextParentUndoUnit will be created here by our callback CreateParentUndoUnitForSelf. ITextContainer textContainer = _selection.Start.TextContainer; ITextPointer anchorPosition = textContainer.CreatePointerAtOffset(_undoAnchorPositionOffset, _undoAnchorPositionDirection); ITextPointer movingPosition = textContainer.CreatePointerAtOffset(_undoMovingPositionOffset, _undoMovingPositionDirection); _selection.Select(anchorPosition, movingPosition); _redoUnit.RecordRedoSelectionState(); } #endregion Public Methods //------------------------------------------------------ // // Protected Methods // //----------------------------------------------------- #region Protected Methods ////// Implements a callback called from base.Do method for /// creating appropriate ParentUndoUnit for redo. /// ///protected override IParentUndoUnit CreateParentUndoUnitForSelf() { _redoUnit = CreateRedoUnit(); return _redoUnit; } protected virtual TextParentUndoUnit CreateRedoUnit() { return new TextParentUndoUnit(this); } protected void MergeRedoSelectionState(TextParentUndoUnit undoUnit) { _redoAnchorPositionOffset = undoUnit._redoAnchorPositionOffset; _redoAnchorPositionDirection = undoUnit._redoAnchorPositionDirection; _redoMovingPositionOffset = undoUnit._redoMovingPositionOffset; _redoMovingPositionDirection = undoUnit._redoMovingPositionDirection; } #endregion Protected Methods //------------------------------------------------------ // // Internal Methods // //----------------------------------------------------- #region Internal Methods /// /// This method should be called just before the undo unit is closed. It will capture /// the current selectionStart and selectionEnd offsets for use later when this undo unit /// gets Redone. /// internal void RecordRedoSelectionState() { RecordRedoSelectionState(_selection.AnchorPosition, _selection.MovingPosition); } ////// This method should be called just before the undo unit is closed. It will capture /// the current selectionStart and selectionEnd offsets for use later when this undo unit /// gets Redone. /// internal void RecordRedoSelectionState(ITextPointer anchorPosition, ITextPointer movingPosition) { _redoAnchorPositionOffset = anchorPosition.Offset; _redoAnchorPositionDirection = anchorPosition.LogicalDirection; _redoMovingPositionOffset = movingPosition.Offset; _redoMovingPositionDirection = movingPosition.LogicalDirection; } #endregion Internal Methods //----------------------------------------------------- // // Private Fields // //----------------------------------------------------- #region Private Fields private readonly ITextSelection _selection; private readonly int _undoAnchorPositionOffset; private readonly LogicalDirection _undoAnchorPositionDirection; private readonly int _undoMovingPositionOffset; private readonly LogicalDirection _undoMovingPositionDirection; private int _redoAnchorPositionOffset; private LogicalDirection _redoAnchorPositionDirection; private int _redoMovingPositionOffset; private LogicalDirection _redoMovingPositionDirection; private TextParentUndoUnit _redoUnit; #if DEBUG // Debug-only unique identifier for this instance. private readonly int _debugId = _debugIdCounter++; // Debug-only id counter. private static int _debugIdCounter; #endif #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
- _AuthenticationState.cs
- WindowsSidIdentity.cs
- WindowsGraphicsWrapper.cs
- XmlNodeChangedEventManager.cs
- Point3DAnimationBase.cs
- ArrayExtension.cs
- ReadOnlyDataSource.cs
- _SafeNetHandles.cs
- ErasingStroke.cs
- XmlSerializer.cs
- UIServiceHelper.cs
- WindowsScrollBar.cs
- InfoCardRSAPKCS1KeyExchangeDeformatter.cs
- GenerateScriptTypeAttribute.cs
- UserPersonalizationStateInfo.cs
- PerformanceCounterCategory.cs
- FormClosingEvent.cs
- XmlElementCollection.cs
- SqlCommand.cs
- MediaTimeline.cs
- CompressedStack.cs
- EventSinkActivityDesigner.cs
- VideoDrawing.cs
- AgileSafeNativeMemoryHandle.cs
- CheckBoxRenderer.cs
- CuspData.cs
- AccessibleObject.cs
- ProgressBarRenderer.cs
- Axis.cs
- DataGridColumn.cs
- ModuleBuilderData.cs
- SchemaImporterExtensionElement.cs
- DefaultValueAttribute.cs
- FontEmbeddingManager.cs
- DbProviderFactory.cs
- StylusSystemGestureEventArgs.cs
- OverlappedAsyncResult.cs
- ObjectCloneHelper.cs
- CatalogPartCollection.cs
- ConfigurationPropertyCollection.cs
- RadioButtonStandardAdapter.cs
- PropertyTabAttribute.cs
- TypeDelegator.cs
- DoubleConverter.cs
- SafeSystemMetrics.cs
- XdrBuilder.cs
- StylusPointCollection.cs
- WebConfigurationHostFileChange.cs
- HtmlInputFile.cs
- X509ChainPolicy.cs
- ToolStripCollectionEditor.cs
- BamlRecordReader.cs
- ResourceKey.cs
- XPathDocumentIterator.cs
- CheckBox.cs
- EncryptedXml.cs
- TimeSpan.cs
- SelectedDatesCollection.cs
- ScriptingWebServicesSectionGroup.cs
- AuthorizationSection.cs
- WrappedIUnknown.cs
- PrivilegeNotHeldException.cs
- DispatcherOperation.cs
- PolygonHotSpot.cs
- LocationUpdates.cs
- DockProviderWrapper.cs
- TreeViewEvent.cs
- VectorConverter.cs
- OutOfMemoryException.cs
- DataGridComboBoxColumn.cs
- SchemaMapping.cs
- EventTrigger.cs
- RuleSettings.cs
- MSAAEventDispatcher.cs
- HebrewCalendar.cs
- ADMembershipUser.cs
- ClassicBorderDecorator.cs
- TraceFilter.cs
- RSACryptoServiceProvider.cs
- UnaryNode.cs
- DefaultHttpHandler.cs
- ApplyTemplatesAction.cs
- DesignerAdapterUtil.cs
- FormatterServices.cs
- XmlNodeReader.cs
- wgx_commands.cs
- AccessViolationException.cs
- ValidatingCollection.cs
- GestureRecognitionResult.cs
- SqlBinder.cs
- HtmlTableCellCollection.cs
- ApplyTemplatesAction.cs
- CryptoApi.cs
- ChannelBase.cs
- DetailsViewDeleteEventArgs.cs
- WebMethodAttribute.cs
- URI.cs
- CharEntityEncoderFallback.cs
- ExpandSegment.cs
- DESCryptoServiceProvider.cs