com.itextpdf.io.font.otf.lookuptype5.SubTableLookup5Format2 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:
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The interactive user interfaces in modified source and object code versions
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*/
package com.itextpdf.io.font.otf.lookuptype5;
import com.itextpdf.io.font.otf.ContextualSubTable;
import com.itextpdf.io.font.otf.ContextualSubstRule;
import com.itextpdf.io.font.otf.OpenTypeFontTableReader;
import com.itextpdf.io.font.otf.OtfClass;
import com.itextpdf.io.font.otf.SubstLookupRecord;
import java.util.Collections;
import java.util.List;
import java.util.Set;
/**
* Contextual Substitution Subtable: Class-based context glyph substitution
*/
public class SubTableLookup5Format2 extends ContextualSubTable {
private static final long serialVersionUID = -2184080481143798249L;
private Set substCoverageGlyphIds;
private List> subClassSets;
private OtfClass classDefinition;
public SubTableLookup5Format2(OpenTypeFontTableReader openReader, int lookupFlag, Set substCoverageGlyphIds, OtfClass classDefinition) {
super(openReader, lookupFlag);
this.substCoverageGlyphIds = substCoverageGlyphIds;
this.classDefinition = classDefinition;
}
public void setSubClassSets(List> subClassSets) {
this.subClassSets = subClassSets;
}
@Override
protected List getSetOfRulesForStartGlyph(int startId) {
if (substCoverageGlyphIds.contains(startId) && !openReader.isSkip(startId, lookupFlag)) {
int gClass = classDefinition.getOtfClass(startId);
return subClassSets.get(gClass);
}
return Collections.emptyList();
}
public static class SubstRuleFormat2 extends ContextualSubstRule {
private static final long serialVersionUID = 652574134066355802L;
// inputClassIds array omits the first class in the sequence,
// the first class is defined by corresponding index of subClassSet array
private int[] inputClassIds;
private SubstLookupRecord[] substLookupRecords;
private OtfClass classDefinition;
public SubstRuleFormat2(SubTableLookup5Format2 subTable, int[] inputClassIds, SubstLookupRecord[] substLookupRecords) {
this.inputClassIds = inputClassIds;
this.substLookupRecords = substLookupRecords;
this.classDefinition = subTable.classDefinition;
}
@Override
public int getContextLength() {
return inputClassIds.length + 1;
}
@Override
public SubstLookupRecord[] getSubstLookupRecords() {
return substLookupRecords;
}
@Override
public boolean isGlyphMatchesInput(int glyphId, int atIdx) {
return classDefinition.getOtfClass(glyphId) == inputClassIds[atIdx - 1];
}
}
}