iText.IO.Font.Otf.ContextualSubstRule Class Reference

Inheritance diagram for iText.IO.Font.Otf.ContextualSubstRule:

Public Member Functions
abstract int	GetContextLength ()
	Returns length of the context glyph sequence defined by this rule.
abstract SubstLookupRecord[]	GetSubstLookupRecords ()
abstract bool	IsGlyphMatchesInput (int glyphId, int atIdx)
	Checks if glyph line element matches element from input sequence of the rule. More...
virtual int	GetLookaheadContextLength ()
	Returns length of the lookahead context glyph sequence defined by this rule.
virtual int	GetBacktrackContextLength ()
	Returns length of the backtrack context glyph sequence defined by this rule.
virtual bool	IsGlyphMatchesLookahead (int glyphId, int atIdx)
	Checks if glyph line element matches element from lookahead sequence of the rule. More...
virtual bool	IsGlyphMatchesBacktrack (int glyphId, int atIdx)
	Checks if glyph line element matches element from backtrack sequence of the rule. More...

Member Function Documentation

GetSubstLookupRecords()

abstract SubstLookupRecord [] iText.IO.Font.Otf.ContextualSubstRule.GetSubstLookupRecords ( )

pure virtual

Returns

an array of

           SubstLookupRecord 
         

. Each record specifies a position in the context glyph sequence and a LookupListIndex to the substitution lookup that is applied at that position.

Implemented in iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format2.SubstRuleFormat2, iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format1.SubstRuleFormat1, iText.IO.Font.Otf.Lookuptype5.SubTableLookup5Format2.SubstRuleFormat2, iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format3.SubstRuleFormat3, iText.IO.Font.Otf.Lookuptype5.SubTableLookup5Format1.SubstRuleFormat1, and iText.IO.Font.Otf.Lookuptype5.SubTableLookup5Format3.SubstRuleFormat3.

IsGlyphMatchesBacktrack()

virtual bool iText.IO.Font.Otf.ContextualSubstRule.IsGlyphMatchesBacktrack ( int  glyphId, int  atIdx  )

inlinevirtual

Checks if glyph line element matches element from backtrack sequence of the rule.

Parameters

glyphId

Parameters atIdx index in rule sequence. Shall be: 0 <= atIdx < ContextualSubstRule.getBacktrackContextLength().

Reimplemented in iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format2.SubstRuleFormat2, iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format1.SubstRuleFormat1, and iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format3.SubstRuleFormat3.

IsGlyphMatchesInput()

abstract bool iText.IO.Font.Otf.ContextualSubstRule.IsGlyphMatchesInput ( int  glyphId, int  atIdx  )

pure virtual

Checks if glyph line element matches element from input sequence of the rule.

Checks if glyph line element matches element from input sequence of the rule.

NOTE: rules do not contain the first element of the input sequence, the first element is defined by rule position in substitution table. Therefore atIdx shall not be 0.

Parameters

glyphId

Parameters atIdx index in the rule sequence. Shall be: 0 < atIdx < ContextualSubstRule.getContextLength().

Implemented in iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format2.SubstRuleFormat2, iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format1.SubstRuleFormat1, iText.IO.Font.Otf.Lookuptype5.SubTableLookup5Format2.SubstRuleFormat2, iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format3.SubstRuleFormat3, iText.IO.Font.Otf.Lookuptype5.SubTableLookup5Format1.SubstRuleFormat1, and iText.IO.Font.Otf.Lookuptype5.SubTableLookup5Format3.SubstRuleFormat3.

IsGlyphMatchesLookahead()

virtual bool iText.IO.Font.Otf.ContextualSubstRule.IsGlyphMatchesLookahead ( int  glyphId, int  atIdx  )

inlinevirtual

Checks if glyph line element matches element from lookahead sequence of the rule.

Parameters

glyphId

Parameters atIdx index in rule sequence. Shall be: 0 <= atIdx < ContextualSubstRule.getLookaheadContextLength().

Reimplemented in iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format2.SubstRuleFormat2, iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format1.SubstRuleFormat1, and iText.IO.Font.Otf.Lookuptype6.SubTableLookup6Format3.SubstRuleFormat3.