Class GlyphPositioningTable.ContextualSubtable

java.lang.Object

org.apache.fop.complexscripts.fonts.GlyphSubtable

org.apache.fop.complexscripts.fonts.GlyphPositioningSubtable

org.apache.fop.complexscripts.fonts.GlyphPositioningTable.ContextualSubtable

All Implemented Interfaces:

Comparable, GlyphPositioning

Direct Known Subclasses:

GlyphPositioningTable.ContextualSubtableFormat1, GlyphPositioningTable.ContextualSubtableFormat2, GlyphPositioningTable.ContextualSubtableFormat3

Enclosing class:

GlyphPositioningTable

private abstract static class GlyphPositioningTable.ContextualSubtable
extends GlyphPositioningSubtable

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

Method Summary

Modifier and Type	Method	Description
(package private) static GlyphPositioningSubtable	create(String id, int sequence, int flags, int format, GlyphCoverageTable coverage, List entries)
abstract GlyphTable.RuleLookup[]	getLookups(int ci, int gi, GlyphPositioningState ps, int[] rv)	Obtain rule lookups set associated current input glyph context.
int	getType()
boolean	isCompatible(GlyphSubtable subtable)	Determine if a glyph subtable is compatible with this glyph subtable.
boolean	position(GlyphPositioningState ps)	Perform glyph positioning at the current index, mutating the positioning state object as required.

Methods inherited from class GlyphPositioningSubtable

getTableType, getTypeName, position, position, 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

ContextualSubtable

ContextualSubtable(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 GlyphPositioningSubtable

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

position

public boolean position(GlyphPositioningState ps)

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

Specified by:

position in interface GlyphPositioning

Overrides:

position in class GlyphPositioningSubtable

Parameters:

ps - glyph positioning state object

Returns:

true if the glyph subtable applies, meaning that the current context matches the associated input context glyph coverage table; note that returning true does not mean any position adjustment occurred; it only means that no further glyph subtables for the current lookup table should be applied.

getLookups

public abstract GlyphTable.RuleLookup[] getLookups(int ci,
 int gi,
 GlyphPositioningState ps,
 int[] rv)

Obtain rule lookups set associated current input glyph context.

Parameters:

ci - coverage index of glyph at current position

gi - glyph index of glyph at current position

ps - glyph positioning state

rv - array of ints used to receive multiple return values, must be of length 1 or greater, where the first entry is used to return the input sequence length of the matched rule

Returns:

array of rule lookups or null if none applies

create

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