FileSurfer.Core.Models.UndoRedoHandler< T > Class Template Reference

Represents a generic undo/redo history chain that supports navigation, insertion, removal, and enumeration around the current position. More...

Collaboration diagram for FileSurfer.Core.Models.UndoRedoHandler< T >:

Public Member Functions
	UndoRedoHandler (Action? onCollectionChanged=null)
	Initializes a new UndoRedoHandler<T> chain.
void	AddNewNode (T data)
	Inserts a new node after the current position and discards any forward history.
bool	IsTail ()
	Determines if the current UndoRedoNode is the end of the UndoRedoHandler<T> chain.
bool	IsHead ()
	Determines if the current UndoRedoNode is the beginning of the UndoRedoHandler<T> chain.
T?	GetPrevious ()
	Gets the data of the previous UndoRedoNode in the UndoRedoHandler<T> chain.
T?	GetNext ()
	Gets the data of the next UndoRedoNode in the UndoRedoHandler<T> chain.
void	MoveToPrevious ()
	Moves to the previous UndoRedoNode in the UndoRedoHandler<T> chain.
void	MoveToNext ()
	Moves to the next UndoRedoNode in the UndoRedoHandler<T> chain.
IEnumerable< T >	EnumerateFromCurrentForward ()
	Enumerates items from the current position forward.
IEnumerable< T >	EnumerateFromCurrentBack ()
	Enumerates items from the current position backward.
void	RemoveCurrent (bool goToPrevious)
	Removes the current UndoRedoNode from the UndoRedoHandler<T> chain.

Package Functions
	UndoRedoNode (T? data, UndoRedoNode? previous=null, UndoRedoNode? next=null)
	Initializes a new node and optionally links it between previous and next nodes.

Package Attributes
readonly? T	Data
	Value stored by this node.
UndoRedoNode?	Previous
	Previous node in the chain.
UndoRedoNode?	Next
	Next node in the chain.

Properties
T?	Current [get]
	Returns the data of the current UndoRedoNode.

Detailed Description

Represents a generic undo/redo history chain that supports navigation, insertion, removal, and enumeration around the current position.

Member Function Documentation

AddNewNode()

void FileSurfer.Core.Models.UndoRedoHandler< T >.AddNewNode ( T data )

inline

Inserts a new node after the current position and discards any forward history.

Parameters

data	Value to store in the newly inserted node.

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EnumerateFromCurrentBack()

IEnumerable< T > FileSurfer.Core.Models.UndoRedoHandler< T >.EnumerateFromCurrentBack ( )

inline

Enumerates items from the current position backward.

Returns

A backward sequence of non-null values before the current node.

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EnumerateFromCurrentForward()

IEnumerable< T > FileSurfer.Core.Models.UndoRedoHandler< T >.EnumerateFromCurrentForward ( )

inline

Enumerates items from the current position forward.

Returns

A forward sequence of non-null values after the current node.

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GetNext()

T? FileSurfer.Core.Models.UndoRedoHandler< T >.GetNext ( )

inline

Gets the data of the next UndoRedoNode in the UndoRedoHandler<T> chain.

GetPrevious()

T? FileSurfer.Core.Models.UndoRedoHandler< T >.GetPrevious ( )

inline

Gets the data of the previous UndoRedoNode in the UndoRedoHandler<T> chain.

IsHead()

bool FileSurfer.Core.Models.UndoRedoHandler< T >.IsHead ( )

inline

Determines if the current UndoRedoNode is the beginning of the UndoRedoHandler<T> chain.

IsTail()

bool FileSurfer.Core.Models.UndoRedoHandler< T >.IsTail ( )

inline

Determines if the current UndoRedoNode is the end of the UndoRedoHandler<T> chain.

MoveToNext()

void FileSurfer.Core.Models.UndoRedoHandler< T >.MoveToNext ( )

inline

Moves to the next UndoRedoNode in the UndoRedoHandler<T> chain.

MoveToPrevious()

void FileSurfer.Core.Models.UndoRedoHandler< T >.MoveToPrevious ( )

inline

Moves to the previous UndoRedoNode in the UndoRedoHandler<T> chain.

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RemoveCurrent()

void FileSurfer.Core.Models.UndoRedoHandler< T >.RemoveCurrent ( bool goToPrevious )

inline

Removes the current UndoRedoNode from the UndoRedoHandler<T> chain.

Throws InvalidOperationException if _current is either _head or _tail.

Parameters

goToPrevious

When true, moves to the previous node after removal; otherwise moves to the next node.

Exceptions

InvalidOperationException

Thrown when _current is _head or _tail.

UndoRedoHandler()

FileSurfer.Core.Models.UndoRedoHandler< T >.UndoRedoHandler ( Action? onCollectionChanged = null )

inline

Initializes a new UndoRedoHandler<T> chain.

Parameters

onCollectionChanged

Optional callback invoked whenever the current position or chain structure changes.

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UndoRedoNode()

FileSurfer.Core.Models.UndoRedoHandler< T >.UndoRedoNode ( T? data, UndoRedoNode? previous = null, UndoRedoNode? next = null )

inlinepackage

Initializes a new node and optionally links it between previous and next nodes.

Parameters

data	Value to store in the node.
previous	Previous node to link from.
next	Next node to link to.

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Member Data Documentation

Data

readonly? T FileSurfer.Core.Models.UndoRedoHandler< T >.Data

package

Value stored by this node.

Next

UndoRedoNode? FileSurfer.Core.Models.UndoRedoHandler< T >.Next

package

Next node in the chain.

Previous

UndoRedoNode? FileSurfer.Core.Models.UndoRedoHandler< T >.Previous

package

Previous node in the chain.

Property Documentation

Current

T? FileSurfer.Core.Models.UndoRedoHandler< T >.Current

get

Returns the data of the current UndoRedoNode.

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The documentation for this class was generated from the following file:

• /home/janecea/Documents/CODE/PROJECTS/FileSurfer/src/FileSurfer.Core/Models/UndoRedoHandler.cs