/*
* 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.
*/
package org.apache.pdfbox.util.operator;
import java.util.List;
import org.apache.pdfbox.util.Matrix;
import org.apache.pdfbox.util.PDFOperator;
import org.apache.pdfbox.cos.COSArray;
import org.apache.pdfbox.cos.COSBase;
import org.apache.pdfbox.cos.COSNumber;
import java.io.IOException;
import org.apache.pdfbox.cos.COSString;
/**
* @author Huault : huault@free.fr
* @version $Revision: 1.6 $
*/
public class ShowTextGlyph extends OperatorProcessor
{
/**
* TJ Show text, allowing individual glyph positioning.
* @param operator The operator that is being executed.
* @param arguments List
* @throws IOException If there is an error processing this operator.
*/
public void process(PDFOperator operator, List<COSBase> arguments) throws IOException
{
COSArray array = (COSArray)arguments.get( 0 );
int arraySize = array.size();
float fontsize = context.getGraphicsState().getTextState().getFontSize();
float horizontalScaling = context.getGraphicsState().getTextState().getHorizontalScalingPercent()/100;
for( int i=0; i<arraySize; i++ )
{
COSBase next = array.get( i );
if( next instanceof COSNumber )
{
float adjustment = ((COSNumber)next).floatValue();
Matrix adjMatrix = new Matrix();
adjustment=-(adjustment/1000)*horizontalScaling*fontsize;
// TODO vertical writing mode
adjMatrix.setValue( 2, 0, adjustment );
context.setTextMatrix( adjMatrix.multiply(context.getTextMatrix(), adjMatrix) );
}
else if( next instanceof COSString )
{
context.processEncodedText( ((COSString)next).getBytes() );
}
else
{
throw new IOException( "Unknown type in array for TJ operation:" + next );
}
}
}
}