org.extex.language.ligature.impl
Class LigatureBuilderImpl

java.lang.Object
  org.extex.language.ligature.impl.LigatureBuilderImpl

All Implemented Interfaces:

java.io.Serializable, LigatureBuilder

public class LigatureBuilderImpl
extends java.lang.Object
implements LigatureBuilder

This class provides an implementation for a ligature builder. Kerning and ligatures are inserted according to the specification from the font.

Version:

$Revision: 4784 $

Author:

Gerd Neugebauer

See Also:

Serialized Form

Field Summary

protected static long

serialVersionUID The constant serialVersionUID contains the id for serialization.

Constructor Summary

LigatureBuilderImpl()
Creates a new object.

Method Summary

UnicodeChar	getLigature(UnicodeChar c1, UnicodeChar c2, Font f) Get a single ligature of to characters.
int	insertLigatures(NodeList list, int start) Take a node list and transform character sequences into ligatures where appropriate.

Methods inherited from class java.lang.Object

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

LigatureBuilderImpl

public LigatureBuilderImpl()

Creates a new object.

Method Detail

getLigature

public UnicodeChar getLigature(UnicodeChar c1,
                               UnicodeChar c2,
                               Font f)

Get a single ligature of to characters.

Specified by:

getLigature in interface LigatureBuilder

Parameters:

c1 - the first character

c2 - the second character

f - the current font

Returns:

the ligature of c1 and c2 or null if none exists

See Also:

LigatureBuilder.getLigature( org.extex.core.UnicodeChar, org.extex.core.UnicodeChar, org.extex.typesetter.tc.font.Font)

insertLigatures

public int insertLigatures(NodeList list,
                           int start)
                    throws HyphenationException

Take a node list and transform character sequences into ligatures where appropriate. The processing should extend over all characters with the same font and non-character nodes. It should return the control to the caller as soon as a character node with another font is found.

Specified by:

insertLigatures in interface LigatureBuilder

Parameters:

list - the node list to create ligatures for

start - the index in the list to start processing

Returns:

the index after last node processed

Throws:

HyphenationException - in case of an error

See Also:

LigatureBuilder.insertLigatures( org.extex.typesetter.type.NodeList, int)