com.itextpdf.io.font.otf.lookuptype6.SubTableLookup6Format3 Maven / Gradle / Ivy
/*
This file is part of the iText (R) project.
Copyright (c) 1998-2019 iText Group NV
Authors: Bruno Lowagie, Paulo Soares, et al.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License version 3
as published by the Free Software Foundation with the addition of the
following permission added to Section 15 as permitted in Section 7(a):
FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
OF THIRD PARTY RIGHTS
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program; if not, see http://www.gnu.org/licenses or write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA, 02110-1301 USA, or download the license from the following URL:
http://itextpdf.com/terms-of-use/
The interactive user interfaces in modified source and object code versions
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You can be released from the requirements of the license by purchasing
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*/
package com.itextpdf.io.font.otf.lookuptype6;
import com.itextpdf.io.font.otf.ContextualSubstRule;
import com.itextpdf.io.font.otf.OpenTypeFontTableReader;
import com.itextpdf.io.font.otf.SubstLookupRecord;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Set;
/**
* Chaining Contextual Substitution Subtable: Coverage-based Chaining Context Glyph Substitution
*/
public class SubTableLookup6Format3 extends SubTableLookup6 {
private static final long serialVersionUID = 764166925472080146L;
ContextualSubstRule substitutionRule;
public SubTableLookup6Format3(OpenTypeFontTableReader openReader, int lookupFlag, SubstRuleFormat3 rule) {
super(openReader, lookupFlag);
this.substitutionRule = rule;
}
@Override
protected List getSetOfRulesForStartGlyph(int startId) {
SubstRuleFormat3 ruleFormat3 = (SubstRuleFormat3) this.substitutionRule;
if (ruleFormat3.inputCoverages.get(0).contains(startId) && !openReader.isSkip(startId, lookupFlag)) {
return Collections.singletonList(this.substitutionRule);
}
return Collections.emptyList();
}
public static class SubstRuleFormat3 extends ContextualSubstRule {
private static final long serialVersionUID = -8817891790304481782L;
List> backtrackCoverages;
List> inputCoverages;
List> lookaheadCoverages;
SubstLookupRecord[] substLookupRecords;
public SubstRuleFormat3(List> backtrackCoverages, List> inputCoverages,
List> lookaheadCoverages, SubstLookupRecord[] substLookupRecords) {
this.backtrackCoverages = backtrackCoverages;
this.inputCoverages = inputCoverages;
this.lookaheadCoverages = lookaheadCoverages;
this.substLookupRecords = substLookupRecords;
}
@Override
public int getContextLength() {
return inputCoverages.size();
}
@Override
public int getLookaheadContextLength() {
return lookaheadCoverages.size();
}
@Override
public int getBacktrackContextLength() {
return backtrackCoverages.size();
}
@Override
public SubstLookupRecord[] getSubstLookupRecords() {
return substLookupRecords;
}
@Override
public boolean isGlyphMatchesInput(int glyphId, int atIdx) {
return inputCoverages.get(atIdx).contains(glyphId);
}
@Override
public boolean isGlyphMatchesLookahead(int glyphId, int atIdx) {
return lookaheadCoverages.get(atIdx).contains(glyphId);
}
@Override
public boolean isGlyphMatchesBacktrack(int glyphId, int atIdx) {
return backtrackCoverages.get(atIdx).contains(glyphId);
}
}
}