ITextUndoHistory Interface
Contains undo transactions.
Namespace: Microsoft.VisualStudio.Text.Operations
Assembly: Microsoft.VisualStudio.Text.Logic (in Microsoft.VisualStudio.Text.Logic.dll)
Syntax
'Dichiarazione
Public Interface ITextUndoHistory _
Inherits IPropertyOwner
public interface ITextUndoHistory : IPropertyOwner
public interface class ITextUndoHistory : IPropertyOwner
type ITextUndoHistory =
interface
interface IPropertyOwner
end
public interface ITextUndoHistory extends IPropertyOwner
The ITextUndoHistory type exposes the following members.
Properties
Name | Description | |
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CanRedo | Determines whether a single redo is possible. |
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CanUndo | Determines whether a single undo is possible. |
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CurrentTransaction | Gets the current undo transaction in progress. |
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LastRedoTransaction | Gets the most recent (top) item of the RedoStack. |
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LastUndoTransaction | Gets the most recent (top) item of the UndoStack. |
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Properties | Gets the collection of properties controlled by the property owner. (Inherited from IPropertyOwner.) |
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RedoDescription | Gets the description of the most recent visible redo ITextUndoTransaction. |
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RedoStack | The redo stack for this history. It does not include any currently open or undo transactions. |
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State | Gets the current state of the undo history. |
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UndoDescription | Gets the description of the most recent visible undo ITextUndoTransaction. |
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UndoStack | The undo stack for this history. It does not include any currently open or redo transactions. |
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Methods
Name | Description | |
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CreateTransaction | Creates a new transaction, nests it in the previously current transaction, and marks it current. |
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Redo | Performs the specified number of redo operation and places the transactions on the undo stack. |
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Undo | Performs the specified number of undo operations and places the transactions on the redo stack. |
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Events
Name | Description | |
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UndoRedoHappened | Notifies consumers when an undo or a redo has happened on this history. |
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UndoTransactionCompleted | Notifies consumers when an ITextUndoTransaction is completed and added to the UndoStack. |
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Remarks
Typically only one undo transaction history at a time is available to the user.