org.extex.unit.tex.typesetter.undo
Class Lastbox

java.lang.Object
  org.extex.interpreter.type.AbstractCode
      org.extex.unit.tex.typesetter.undo.Lastbox

All Implemented Interfaces:

java.io.Serializable, Boxable, BoxOrRule, Code

public class Lastbox
extends AbstractCode
implements Boxable

This class provides an implementation for the primitive \lastbox.

The Primitive \lastbox

TODO missing documentation

Syntax

The formal description of this primitive is the following:

    ⟨lastbox⟩
    → \lastbox  

Examples

    \lastbox  

    \box1=\lastbox  

Version:

$Revision:4431 $

Author:

Gerd Neugebauer

See Also:

Serialized Form

Field Summary

protected static long

serialVersionUID The constant serialVersionUID contains the id for serialization.

Constructor Summary

Lastbox(CodeToken token)
Creates a new object.

Method Summary

void	execute(Flags prefix, Context context, TokenSource source, Typesetter typesetter) This method takes the first token and executes it.
Box	getBox(Context context, TokenSource source, Typesetter typesetter, Token insert) Getter for the content as Box.

Methods inherited from class org.extex.interpreter.type.AbstractCode

getLocalizer, getName, getToken, isIf, isOuter, readResolve, toString, toText, toText

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

serialVersionUID

protected static final long serialVersionUID

The constant serialVersionUID contains the id for serialization.

See Also:

Constant Field Values

Constructor Detail

Lastbox

public Lastbox(CodeToken token)

Creates a new object.

Parameters:

token - the initial token for the primitive

Method Detail

execute

public void execute(Flags prefix,
                    Context context,
                    TokenSource source,
                    Typesetter typesetter)
             throws HelpingException,
                    TypesetterException

This method takes the first token and executes it. The result is placed on the stack. This operation might have side effects. To execute a token it might be necessary to consume further tokens.

Specified by:

execute in interface Code

Overrides:

execute in class AbstractCode

Parameters:

prefix - the prefix controlling the execution

context - the interpreter context

source - the token source

typesetter - the typesetter

Throws:

HelpingException - in case of an error

TypesetterException - in case of an error in the typesetter

See Also:

AbstractCode.execute( org.extex.interpreter.Flags, org.extex.interpreter.context.Context, org.extex.interpreter.TokenSource, org.extex.typesetter.Typesetter)

getBox

public Box getBox(Context context,
                  TokenSource source,
                  Typesetter typesetter,
                  Token insert)
           throws HelpingException,
                  TypesetterException

Getter for the content as Box.

Specified by:

getBox in interface Boxable

Parameters:

context - the interpreter context

source - the source for new tokens

typesetter - the typesetter to use

insert - the token to insert either at the beginning of the box or after the box has been gathered. If it is null then nothing is inserted

Returns:

an appropriate Box

Throws:

HelpingException - in case of an error

TypesetterException - in case of an error in the typesetter

See Also:

Boxable.getBox( org.extex.interpreter.context.Context, org.extex.interpreter.TokenSource, org.extex.typesetter.Typesetter, org.extex.scanner.type.token.Token)