com.itextpdf.io.font.otf

Class ContextualSubTable

java.lang.Object

com.itextpdf.io.font.otf.ContextualTable<ContextualSubstRule>

com.itextpdf.io.font.otf.ContextualSubTable

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

SubTableLookup5Format1, SubTableLookup5Format2, SubTableLookup5Format3, SubTableLookup6

public abstract class ContextualSubTable
extends ContextualTable<ContextualSubstRule>

See Also:

Serialized Form

Field Summary

Fields inherited from class com.itextpdf.io.font.otf.ContextualTable

lookupFlag, openReader

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ContextualSubTable(OpenTypeFontTableReader openReader, int lookupFlag)

Method Summary

Modifier and Type	Method and Description
protected int	checkIfContextMatch(GlyphLine line, ContextualSubstRule rule) Checks if given glyph line matches given rule.
ContextualSubstRule	getMatchingContextRule(GlyphLine line) Gets a most preferable context rule that matches the line at current position.

Methods inherited from class com.itextpdf.io.font.otf.ContextualTable

getSetOfRulesForStartGlyph

Methods inherited from class java.lang.Object

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

Constructor Detail

ContextualSubTable

protected ContextualSubTable(OpenTypeFontTableReader openReader,
                             int lookupFlag)

Method Detail

getMatchingContextRule

public ContextualSubstRule getMatchingContextRule(GlyphLine line)

Description copied from class: ContextualTable

Gets a most preferable context rule that matches the line at current position. If no matching context rule is found, it returns null.

NOTE: if matching context rule is found, the GlyphLine.start and GlyphLine.end will be changed in such way that they will point at start and end of the matching context glyph sequence inside the glyph line.

Overrides:

getMatchingContextRule in class ContextualTable<ContextualSubstRule>

Parameters:

line - a line, which is to be checked if it matches some context.

Returns:

matching context rule or null, if none was found.

checkIfContextMatch

protected int checkIfContextMatch(GlyphLine line,
                                  ContextualSubstRule rule)

Description copied from class: ContextualTable

Checks if given glyph line matches given rule.

Overrides:

checkIfContextMatch in class ContextualTable<ContextualSubstRule>

Parameters:

line - glyph line to be checked

rule - rule to be compared with a given glyph line

Returns:

either index which corresponds to the last glyph of the matching context inside the glyph line if context matches, or -1 if context doesn't match