org.apache.fop.complexscripts.scripts.KhmerScriptProcessor Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* $Id$ */
package org.apache.fop.complexscripts.scripts;
import java.util.List;
import org.apache.fop.complexscripts.fonts.GlyphDefinitionTable;
import org.apache.fop.complexscripts.fonts.GlyphTable;
import org.apache.fop.complexscripts.util.CharAssociation;
import org.apache.fop.complexscripts.util.GlyphContextTester;
import org.apache.fop.complexscripts.util.GlyphSequence;
import org.apache.fop.complexscripts.util.ScriptContextTester;
import org.apache.fop.fonts.MultiByteFont;
/**
* The KhmerScriptProcessor class implements a script processor for
* performing glyph substitution and positioning operations on content associated with the Khmer script.
*/
public class KhmerScriptProcessor extends IndicScriptProcessor {
private GlyphSequence unprocessedGS;
private List associations;
private int[] chars;
KhmerScriptProcessor(String script) {
super(script);
}
protected Class getSyllabizerClass() {
return KhmerSyllabizer.class;
}
private static class KhmerSyllabizer extends DefaultSyllabizer {
KhmerSyllabizer(String script, String language) {
super(script, language);
}
}
@Override
public GlyphSequence reorderCombiningMarks(GlyphDefinitionTable gdef, GlyphSequence glyphSequence,
int[] unscaledWidths, int[][] glyphPositionAdjustments, String script,
String language) {
return glyphSequence;
}
public CharSequence preProcess(CharSequence charSequence, MultiByteFont font, List associations) {
unprocessedGS = font.charSequenceToGlyphSequence(charSequence, associations);
return new KhmerRenderer().render(charSequence.toString());
}
public boolean position(GlyphSequence glyphSequence, String script, String language, int fontSize,
GlyphTable.UseSpec[] useSpecs, int[] widths, int[][] adjustments,
ScriptContextTester scriptContextTester) {
glyphSequence.setUnprocessedGS(unprocessedGS);
return super.position(glyphSequence, script, language, fontSize, useSpecs, widths, adjustments,
scriptContextTester);
}
public GlyphSequence substitute(GlyphSequence glyphSequence, String script, String language,
GlyphTable.UseSpec[] useSpecs, ScriptContextTester scriptContextTester) {
glyphSequence = super.substitute(glyphSequence, script, language, useSpecs, scriptContextTester);
associations = glyphSequence.getAssociations();
chars = glyphSequence.getCharacters().array();
return glyphSequence;
}
private ScriptContextTester scriptContextTester = new ScriptContextTester() {
private GlyphContextTester tester = new GlyphContextTester() {
public boolean test(String script, String language, String feature, GlyphSequence glyphSequence, int index,
int flags) {
CharAssociation charAssociation = (CharAssociation) associations.get(index);
char vowelSignU = '\u17BB';
for (int i = charAssociation.getStart(); i < charAssociation.getEnd(); i++) {
if (chars[i] == vowelSignU) {
return false;
}
}
return true;
}
};
public GlyphContextTester getTester(String feature) {
return tester;
}
};
public ScriptContextTester getPositioningContextTester() {
return scriptContextTester;
}
}