Memento_TextObject Class Reference

Container for a string. Need to use a class that allows the text to be changed while the container (this class) remains constant. This way, operations can be applied to the text and the container's contents change but not the container (strings are immutable in C#; this dances around that problem). More...

Collaboration diagram for Memento_TextObject:

Classes
class	Memento
	Represents a single memento (snapshot) of the text state before an operation is applied. The operation becomes the name of the memento for display purposes. More...

Public Member Functions
	Memento_TextObject (string text)
	Constructs a text object with an initial string.
IMemento	GetMemento (string operationName)
	Returns an IMemento object containing a snapshot of the text stored in this class instance.
void	RestoreMemento (IMemento memento)
	Sets the text in this class instance to the snapshot stored in the given IMemento object (which is assumed to be from this class).
override string	ToString ()
	Converts the Memento_TextObject to a string (makes it easier to use the class in string formatting).

Properties
string	Text [get, set]
	Gets or sets the text in this TextObject.

Private Attributes
string	_text
	The text that can change in this Memento_TextObject class.

Detailed Description

Container for a string. Need to use a class that allows the text to be changed while the container (this class) remains constant. This way, operations can be applied to the text and the container's contents change but not the container (strings are immutable in C#; this dances around that problem).

Definition at line 36 of file Memento.cs.

Constructor & Destructor Documentation

Memento_TextObject()

Memento_TextObject ( string  text )

inline

Constructs a text object with an initial string.

Parameters

text	The initial string for the text object.

Definition at line 121 of file Memento.cs.

References Memento_TextObject._text.

Member Function Documentation

GetMemento()

IMemento GetMemento ( string  operationName )

inline

Returns an IMemento object containing a snapshot of the text stored in this class instance.

Definition at line 145 of file Memento.cs.

References Memento_TextObject._text.

Referenced by Memento_Exercise.Memento_SaveForUndo().

RestoreMemento()

void RestoreMemento ( IMemento  memento )

inline

Sets the text in this class instance to the snapshot stored in the given IMemento object (which is assumed to be from this class).

Parameters

memento

The IMemento object to restore to.

Definition at line 156 of file Memento.cs.

References Memento_TextObject._text.

Referenced by Memento_Exercise.Memento_Undo().

ToString()

override string ToString ( )

inline

Converts the Memento_TextObject to a string (makes it easier to use the class in string formatting).

Returns

Returns the text stored in the text object.

Definition at line 167 of file Memento.cs.

References Memento_TextObject._text.

Member Data Documentation

_text

string _text

private

The text that can change in this Memento_TextObject class.

Definition at line 110 of file Memento.cs.

Referenced by Command_TextObject.__init__(), Memento_TextObject.__init__(), Memento_TextObject.GetMemento(), Memento_TextObject.Memento_TextObject(), Command_TextObject.Reset(), Memento_TextObject.RestoreMemento(), Command_TextObject.Text(), Memento_TextObject.Memento.Text(), Memento_TextObject.Text(), Memento_TextObject.ToString(), and Command_TextObject.ToString().

Property Documentation

Text

string Text

getset

Gets or sets the text in this TextObject.

Definition at line 129 of file Memento.cs.

Referenced by Memento_Exercise.Memento_Operation_Replace(), and Memento_Exercise.Memento_Operation_Reverse().

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

• Memento.cs