Class GlyphSubstitutionTable.AlternateSubtable

java.lang.Object

org.apache.fop.complexscripts.fonts.GlyphSubtable

org.apache.fop.complexscripts.fonts.GlyphSubstitutionSubtable

org.apache.fop.complexscripts.fonts.GlyphSubstitutionTable.AlternateSubtable

All Implemented Interfaces:

Comparable, GlyphSubstitution

Direct Known Subclasses:

GlyphSubstitutionTable.AlternateSubtableFormat1

Enclosing class:

GlyphSubstitutionTable

private abstract static class GlyphSubstitutionTable.AlternateSubtable
extends GlyphSubstitutionSubtable

Field Summary

Fields inherited from class GlyphSubtable

LF_IGNORE_BASE, LF_IGNORE_LIGATURE, LF_IGNORE_MARK, LF_INTERNAL_USE_REVERSE_SCAN, LF_MARK_ATTACHMENT_TYPE, LF_RESERVED, LF_RIGHT_TO_LEFT, LF_USE_MARK_FILTERING_SET

Constructor Summary

Constructors

Constructor	Description
AlternateSubtable(String id, int sequence, int flags, int format, GlyphCoverageTable coverage, List entries)

Method Summary

Modifier and Type	Method	Description
(package private) static GlyphSubstitutionSubtable	create(String id, int sequence, int flags, int format, GlyphCoverageTable coverage, List entries)
abstract int[]	getAlternatesForCoverageIndex(int ci, int gi)	Obtain glyph alternates for coverage index.
int	getType()
boolean	isCompatible(GlyphSubtable subtable)	Determine if a glyph subtable is compatible with this glyph subtable.
boolean	substitute(GlyphSubstitutionState ss)	Perform glyph substitution at the current index, mutating the substitution state object as required.

Methods inherited from class GlyphSubstitutionSubtable

getTableType, getTypeName, substitute, substitute, usesReverseScan

Methods inherited from class GlyphSubtable

compareTo, equals, getClasses, getCoverage, getCoverageIndex, getCoverageSize, getEntries, getFlags, getFlags, getFormat, getGDEF, getLookupId, getSequence, getTable, hashCode, resolveLookupReferences, setTable, usesReverseScan

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AlternateSubtable

public AlternateSubtable(String id,
 int sequence,
 int flags,
 int format,
 GlyphCoverageTable coverage,
 List entries)

Method Details

getType

public int getType()

Specified by:

getType in class GlyphSubtable

Returns:

this subtable's type

isCompatible

public boolean isCompatible(GlyphSubtable subtable)

Determine if a glyph subtable is compatible with this glyph subtable. Two glyph subtables are compatible if the both may appear in a single lookup table.

Overrides:

isCompatible in class GlyphSubstitutionSubtable

Parameters:

subtable - a glyph subtable to determine compatibility

Returns:

true if specified subtable is compatible with this glyph subtable, where by compatible is meant that they share the same lookup type

substitute

public boolean substitute(GlyphSubstitutionState ss)

Perform glyph substitution at the current index, mutating the substitution state object as required. Only the context associated with the current index is processed.

Specified by:

substitute in interface GlyphSubstitution

Overrides:

substitute in class GlyphSubstitutionSubtable

Parameters:

ss - glyph substitution state object

Returns:

true if the glyph subtable was applied, meaning that the current context matches the associated input context glyph coverage table

getAlternatesForCoverageIndex

public abstract int[] getAlternatesForCoverageIndex(int ci,
 int gi)
                                             throws IllegalArgumentException

Obtain glyph alternates for coverage index.

Parameters:

ci - coverage index

gi - original glyph index

Returns:

sequence of glyphs to substitute for input glyph

Throws:

IllegalArgumentException - if coverage index is not valid

create

static GlyphSubstitutionSubtable create(String id,
 int sequence,
 int flags,
 int format,
 GlyphCoverageTable coverage,
 List entries)