org.extex.unit.tex.typesetter.paragraph
Class Par

java.lang.Object
  org.extex.interpreter.type.AbstractCode
      org.extex.unit.tex.typesetter.paragraph.Par

All Implemented Interfaces:

java.io.Serializable, Code

public class Par
extends AbstractCode

This class provides an implementation for the primitive \par.

The Primitive \par

The primitive \par signals the end of a paragraph. If ExTeX is in a horizontal mode then the preceding material is typeset and the paragraph is added to the vertical list. ExTeX goes into a vertical mode afterwards.

If ExTeX is in a vertical mode then this primitive is simply ignored.

The scanner rules of TeX determine that the macro \par is inserted for any number of subsequent empty lines. This means that in a normal text there might be a lot of invocations of \par even if none of them is written explicitly.

Syntax

The formal description of this primitive is the following:

    ⟨par⟩
      → \par  

Examples

    abc \par  def 

The Dimen Parameter \parindent

The dimen parameter \parindent contains indentation to be applied for each paragraph.

Syntax

The formal description of this primitive is the following:

    ⟨parindent⟩
      → \parindent ⟨equals⟩ ⟨dimen⟩  

Examples

    \parindent=12em  

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

Par(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. 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.

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

Par

public Par(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:

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