com.itextpdf.io.font.otf

Class ChainingContextualTable<T extends ContextualRule>

java.lang.Object

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

com.itextpdf.io.font.otf.ChainingContextualTable<T>

Direct Known Subclasses:

PosTableLookup8Format1, PosTableLookup8Format2, PosTableLookup8Format3, SubTableLookup6Format1, SubTableLookup6Format2, SubTableLookup6Format3

public abstract class ChainingContextualTable<T extends ContextualRule>
extends ContextualTable<T>

Field Summary

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

lookupFlag, openReader

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
protected boolean	checkIfBacktrackContextMatch(GlyphLine line, T rule) Checks if given glyph line at the given position matches given rule.
protected boolean	checkIfLookaheadContextMatch(GlyphLine line, T rule, int startIdx) Checks if given glyph line at the given position matches given rule.
T	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

checkIfContextMatch, getSetOfRulesForStartGlyph

Methods inherited from class java.lang.Object

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

Constructor Detail

ChainingContextualTable

protected ChainingContextualTable(OpenTypeFontTableReader openReader,
                                  int lookupFlag)

Method Detail

getMatchingContextRule

public T 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<T extends ContextualRule>

Parameters:

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

Returns:

matching context rule or null, if none was found.

checkIfLookaheadContextMatch

protected boolean checkIfLookaheadContextMatch(GlyphLine line,
                                               T rule,
                                               int startIdx)

Checks if given glyph line at the given position matches given rule.

Parameters:

line - glyph line to be checked

rule - rule to be compared with a given line

startIdx - glyph line position

Returns:

true if given glyph line at the given position matches given rule

checkIfBacktrackContextMatch

protected boolean checkIfBacktrackContextMatch(GlyphLine line,
                                               T rule)

Checks if given glyph line at the given position matches given rule.

Parameters:

line - glyph line to be checked

rule - rule to be compared with a given line

Returns:

true if given glyph line matches given rule